To estimate a maximum purchase price for the coin in question, we can analyze the provided data:

1. Current Grade: The coin has a grade of 70 (MS-), which is a medium level. This suggests that its value should be in line with other coins of similar grade.

2. Auction History:
- The average hammer price for coins with a grade of 70 in the past has been approximately 173.71 euros.
- In previous auctions, hammer prices for coins with a grade of 70 have varied, but they have sold for prices ranging from 120 to 237 euros.

3. Starting Price: The current starting price is 150 euros, which is a reasonable starting point.

4. Price Trends: Observing previous hammer prices, it seems that coins with a grade of 70 tend to sell above the starting price, especially if there is interest in the auction.

5. Estimation: Given that the average hammer price is 173.71 euros and considering that the starting price is 150 euros, a reasonable maximum purchase price could be in the range of 200 to 220 euros, assuming there is competition in the auction.

Therefore, an estimated maximum purchase price for this coin could be 200 euros. This allows for a margin for competition and the interest of other bidders.

To estimate a maximum purchase price for the coin in question, we will consider several factors:

1. Starting Price: 1000 euros. This is the initial price set for the auction.
2. Condition: The coin has a condition rating of 70 (VF-), indicating that it is in an acceptable state, but not of high quality. This may influence the final price.
3. Auction History: The coin has been auctioned in the past on two occasions, with a hammer price of 380 euros in one of them. This suggests that the market has valued the coin in a lower range than the current starting price.
4. Average Hammer Price: The average hammer price of 380 euros also indicates that, in general, buyers are not willing to pay much more than this amount for the coin.
5. Average Starting Price: The average starting price of 533.33 euros may be an indicator of what sellers have expected to obtain in the past.

Given that the current starting price is significantly higher than previous hammer prices and the average hammer price, it is likely that buyer interest will be limited.

Taking all these factors into account, an estimated maximum purchase price could be around 400-500 euros, which is a range more in line with the sales history and the condition of the coin. This would allow a buyer to align with the market value observed in previous auctions.

To estimate a maximum purchase price for the coin in question, we can analyze the provided data:

1. Current Condition: The coin has a condition rating of 75 (MBC), indicating that it is in fairly good shape, although not the best possible condition.

2. Auction History:
- In the past, the coin has been auctioned 5 times and has sold in all of them.
- The hammer prices have varied, with a maximum of 445 euros and a minimum of 288 euros.
- The average hammer price in previous auctions is approximately 382.6 euros.

3. Current Starting Price: The starting price is 400 euros, which is slightly higher than the average hammer price in previous auctions.

4. Price Trends:
- In previous auctions, the hammer price has ranged from 288 to 445 euros, suggesting that the market is willing to pay within that range.
- The condition of 75 is comparable to previous auctions where coins with similar conditions were sold.

5. Estimation: Given that the starting price is 400 euros and considering the history of hammer prices, an estimated maximum purchase price could be around 450 euros, which is slightly higher than the starting price and aligns with the range of previous hammer prices.

Therefore, the estimated maximum purchase price for this coin could be 450 euros.

To estimate a maximum purchase price for the coin in question, we will consider several factors:

1. Current Condition: The coin has a condition of 30 (BC+), which indicates that it is in fairly low condition. This will negatively affect its value compared to coins in better condition.

2. Auction History:
- In the past, coins of the same reference with higher conditions (85 and 75) have been auctioned for 800 and 440 euros, respectively.
- The last auction with a condition of 75 had a hammer price of 440 euros, suggesting that the value of the coin decreases significantly with a lower condition.

3. Starting Price and Average Prices:
- The current starting price is 300 euros, and the average hammer price in previous auctions has been 620 euros, but this refers to coins in better condition.

4. Sales Trends: The coin has sold in 3 of the last 4 auctions, indicating interest in the coin, although the current condition may limit the price.

Given that the condition of the coin is quite low (30), and considering the hammer prices of coins in better condition, an estimated maximum purchase price could be set at a lower range.

Estimated Maximum Purchase Price:
Taking all these factors into account, a reasonable maximum purchase price could be between 150 and 250 euros. This is based on the need to adjust the value downward due to the condition and the interest shown in previous auctions.

To estimate a maximum purchase price for the coin in question, we can analyze the provided data:

1. Current starting price: 700 euros.
2. Coin condition: 80 (MBC+), indicating good preservation.
3. Auction history:
- In 2020, it was auctioned with a starting price of 500 euros and sold for 800 euros.
- In 2019, the starting price was 460 euros and it sold for 585 euros.
- In 2016, the starting price was 500 euros and it sold for 500 euros (no increase).
- In 2014, the starting price was 1200 euros and it sold for 1550 euros, indicating high interest in that auction.
- In 2023, the starting price was 700 euros and it sold for 925 euros.

4. Average hammer price: 872 euros, suggesting that, in general, coins of this reference tend to sell above their starting price.

Given that the coin is in good condition (80) and considering the hammer price history, an estimated maximum purchase price could be slightly higher than the average hammer price.

Estimation:
- Based on the average hammer price (872 euros) and the fact that it has reached higher prices in previous auctions, a reasonable maximum purchase price could be in the range of 900 to 950 euros.

Therefore, I would recommend considering a maximum purchase price of 950 euros for this coin at the auction.

To estimate a maximum purchase price for the coin in question, let's consider several factors:

1. Current starting price: 900 euros.
2. Current grade: 30 (BC+), which indicates a fairly low grade.
3. Auction history: The coin has been auctioned once before, with a starting price of 3000 euros and a hammer price of 5000 euros at a grade of 70. This suggests that the coin may have significant value in better condition.
4. Average starting and hammer price: The average starting price is 1950 euros and the average hammer price is 5000 euros, indicating that, in general, this coin has high sales potential.

Given that the current grade is quite low (30), the hammer price will not be as high as in the previous case (grade 70). However, the interest in the coin and its auction history suggest that there could be considerable value.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 1000 to 1500 euros. This is based on the current starting price and the coin's potential, but adjusted for its low grade.

Therefore, a reasonable maximum purchase price could be 1200 euros.

To estimate a maximum purchase price for the coin in question, let's consider several factors:

1. Current starting price: 1500 euros. This is the initial price set for the auction.
2. Condition: The coin has a condition rating of 80 (MBC+), indicating that it is in quite good shape. This may positively influence its value.
3. Historical data: In the previous auction, the same coin was offered with a starting price of 600 euros and was sold for 700 euros, with a condition rating of 75. This suggests that the market has valued this coin in a range of 600 to 700 euros in the past.
4. Average starting and final prices: The average starting price is 1050 euros and the average final price is 700 euros. This indicates that, generally, coins of this reference tend to sell for below their starting price.

Given that the condition of the current coin is better than that of the previous auction, this could justify a higher price. However, the starting price of 1500 euros seems quite high compared to historical prices.

Taking all these factors into account, an estimated maximum purchase price could be positioned between the average final price (700 euros) and an upper margin that considers the better condition. We could estimate a maximum purchase price around 900-1000 euros, which would reflect a reasonable value considering the condition and sales history.

Therefore, the estimated maximum purchase price would be approximately 900 euros.

To estimate a maximum purchase price for the coin in question, we will consider several factors:

1. Current Condition: The coin has a condition rating of 75 (MBC), indicating that it is in relatively good shape, but not among the highest qualities.

2. Historical Prices: Looking at previous auction prices, we can see that the coin has reached auction prices of up to 2300 euros in higher conditions (95 condition). However, in conditions closer to the current one (75-80 condition), the auction prices have been lower, such as 550 euros in 2015 and 300 euros in 2021.

3. Starting Price and Average Hammer Price: The current starting price is 300 euros, and the average hammer price in previous auctions is 756.67 euros. This suggests that, in general, the coin tends to sell for a price higher than the starting price.

4. Auction Trends: The coin has been auctioned 11 times, of which 10 have sold. This indicates good demand and consistent interest in the coin.

5. Estimation Based on Condition: Given that the current condition is 75, and considering that in the past coins with similar conditions have reached hammer prices of around 300 to 550 euros, we can estimate that the hammer price could be in a similar range.

Taking all these factors into account, an estimated maximum purchase price for this coin could be between 500 and 700 euros, considering that the interest in the coin and the current condition could lead to a hammer price higher than the historical average. However, given the starting price of 300 euros, it is likely that the hammer price will not significantly exceed 700 euros.

Therefore, a reasonable maximum purchase price could be 700 euros.

To estimate a maximum purchase price for the coin in question, we can analyze several factors:

1. Current Condition: The coin has a condition of 70 (MBC-), which indicates that it is in an acceptable state, but not among the best qualities. This can influence the price, as coins in better condition tend to reach higher prices.

2. Previous Prices: By observing previous auction prices for coins with a similar condition (70), we can see that they have reached hammer prices of up to 240 euros in recent auctions. For example, in the auction on March 17, 2022, the coin with a condition of 70 was sold for 240 euros.

3. Starting Price and Average Hammer Price: The current starting price is 150 euros, and the average hammer price in previous auctions is 164.43 euros. This suggests that the hammer price could be in a similar range or slightly above the starting price.

4. Sales Trends: The coin has been auctioned 15 times, of which 14 have sold, indicating good demand. This can influence the hammer price, as a high sales rate suggests that collectors are interested in this coin.

5. Maximum Price Estimate: Given that the highest hammer price for a coin with a similar condition has been 240 euros, and considering that the starting price is 150 euros, a reasonable maximum purchase price could be in the range of 200 to 240 euros, depending on the competition in the auction.

Conclusion: Based on the information provided, an estimated maximum purchase price for this coin could be approximately 220 euros. This allows for a margin to compete in the auction, taking into account the condition and previous hammer prices.

To estimate a maximum purchase price for the coin in question, we can consider several factors based on the provided data:

1. Current Condition: The coin has a condition of 70 (VF-). This is an important factor, as coins in better condition tend to reach higher prices.

2. Auction History:
- The coin has been auctioned 7 times, of which it has sold 6 times. This indicates a consistent interest in the coin.
- The average hammer price in previous auctions is 314 euros, suggesting that, in general, buyers are willing to pay more than the starting price.

3. Previous Auction Prices:
- In the 2020 auction, the coin sold for 260 euros with a condition of 80.
- In 2019, although it did not sell, the estimated price was 300 euros with a condition of 75.
- In 2021, it sold for 280 euros with a condition of 75.
- In 2023, it was auctioned with a condition of 70 but did not sell, with a starting price of 140 euros.

4. Current Starting Price: The starting price is 200 euros, which is slightly higher than the average starting price of 182.14 euros.

Given that the coin's condition is 70 and considering the auction price history, an estimated maximum purchase price could be in a range between the average hammer price (314 euros) and the highest recorded hammer price (700 euros in 2015, although with unspecified condition).

Taking all these factors into account, a reasonable estimated maximum purchase price could be around 300-350 euros. This is based on historical interest and the average hammer price, adjusted for the current condition of the coin.

To estimate a maximum purchase price for the coin in question, we will consider several factors:

1. Current Condition: The coin has a condition rating of 75 (MBC), which indicates that it is in fairly good shape, but not the best possible condition.

2. Historical Prices: By looking at previous auction prices for coins with similar conditions, we can see that the hammer prices have varied. For example:
- In past auctions, coins with conditions ranging from 70 to 80 have had hammer prices between 220 and 300 euros.
- The last auction of a coin with a condition of 95 reached a hammer price of 500 euros, indicating that coins in better condition can fetch significantly higher prices.

3. Starting Price and Average Price: The current starting price is 350 euros, and the average hammer price in the past has been 278.38 euros. This suggests that the starting price is relatively high compared to the average hammer price.

4. Recent Trends: In the most recent auctions, hammer prices have shown a trend of increasing, especially for coins in good condition.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 300 to 400 euros. This is because, although the starting price is 350 euros, the condition of 75 suggests that the hammer price should not significantly exceed the starting price unless there is exceptional demand.

Therefore, a reasonable maximum purchase price could be 400 euros.

Given that the coin has a grade of 70 (MBC-), indicating good quality, and considering that it is being auctioned for the first time, the starting price is set at 350 euros.

Without historical sales data for this reference, it is difficult to establish an exact hammer price. However, in auctions, it is common for the final price to be between 1.5 and 2 times the starting price, especially for coins in good condition.

Therefore, an estimated maximum purchase price could be in the range of 525 to 700 euros, depending on the interest of collectors and competition in the auction.

I would recommend keeping an eye on the auction and considering these factors when setting your bidding limit.

Given that the coin has a condition of 30 (BC+), which indicates that it is in quite low condition, and considering that there have been no previous auctions or sales of this reference, the starting price of 650 euros seems a bit high for its state of preservation.

In general, coins in lower conditions tend to have final prices significantly lower than their starting prices, especially if there is no sales history to support the price.

Since there is no historical data for this coin and considering its condition, an estimated maximum purchase price could be in the range of 200 to 300 euros, depending on the interest of collectors and demand at the auction. This would allow potential buyers to take into account the risk associated with purchasing a coin in low condition.