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 rating of 70 (VF-). This indicates that it is in an acceptable state, but not of high quality. In comparison with previously auctioned coins, a condition of 70 is similar to one from past auctions.

2. Previous Prices:
- In the 2020 auction, a coin with a condition of 75 had a starting price of 18 euros, but it did not sell.
- In 2022, a coin with a condition of 90 sold for 140 euros, indicating that the price can significantly increase with better condition.
- In another 2022 auction, a coin with a condition of 70 had a starting price of 15 euros, but it did not sell.

3. Average Hammer Price: The average hammer price for similar coins is 140 euros, suggesting that there is a market willing to pay high prices for coins in good condition.

4. Starting Price and Estimates: The current starting price is 12 euros, which is quite low compared to the average hammer price. The average starting price of 31.25 euros also suggests that there is potential for price increase.

5. Demand and Supply: Given that there is an auction scheduled in the coming days and considering that there have been more auctions without sales, this may influence demand.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 30 to 50 euros, considering that the condition is a limiting factor and that the hammer price may be higher depending on demand at the auction.

Therefore, a reasonable maximum purchase price could be 40 euros.

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

1. Current starting price: 60 euros.
2. Coin condition: 70 (MBC-), indicating good condition, although not the best.
3. Auction history:
- In 2019, the coin was auctioned with a starting price of 60 euros and sold for 60 euros, indicating that the starting price was appropriate for its condition.
- In 2014, it was auctioned with starting prices of 20 and 15 euros, and sold for 25 euros in both cases, suggesting that interest in the coin has increased over time.

4. Average hammer price: 36.67 euros, which is lower than the current starting price, but may reflect an increase in demand or in the coin's condition.

5. Auction trends: The coin has been sold every time it has been auctioned, indicating consistent interest.

Given that the coin is in good condition and has maintained its value in previous auctions, an estimated maximum purchase price could be slightly higher than the current starting price, but not too much, to avoid overpaying.

Estimated maximum purchase price: 80 euros.

This price reflects a moderate increase over the starting price, considering the good condition and auction history.

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 quite good shape. This is important because coins in better condition tend to fetch higher prices.

2. Auction History:
- The average hammer price for similar coins has been 54.4 euros.
- In previous auctions, hammer prices for coins with a similar condition (75) have varied, but there are examples of sales reaching up to 90 euros (as seen in the auction on March 1, 2023).

3. Starting Price and Average Starting Price: The starting price is 40 euros, and the average starting price is 36 euros. This suggests that the starting price is reasonable and could attract bidders.

4. Sales Trends: The coin has been sold in 11 out of the last 12 auctions, indicating good demand.

5. Previous Estimates: In past auctions, the estimated price has been as high as 90 euros, suggesting there is potential for a higher hammer price.

Considering all these factors, an estimated maximum purchase price could be around 80-90 euros, given that the condition is good and there is a history of hammer prices supporting this figure. However, to be conservative and considering the starting price, a safer maximum purchase price could be approximately 75-80 euros.

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

1. Coin Condition: The coin has a condition rating of 80 (MBC+), indicating that it is in quite good shape.

2. Auction History:
- The average hammer price for coins with a similar condition (80) has been approximately 45 euros in previous auctions.
- The last auction of a coin with a condition of 80 had a hammer price of 65 euros.

3. Average Starting and Hammer Prices:
- The average starting price is 20.75 euros, and the average hammer price is 38.47 euros. This suggests that coins tend to sell for a price higher than the starting price.

4. Price Trends:
- In previous auctions, hammer prices for coins with a condition of 80 have varied, but the range has been from 30 to 100 euros, depending on demand and other factors.

5. Current Starting Price: The starting price is 5 euros, which is quite low compared to previous hammer prices.

Based on this data, an estimated maximum purchase price for the coin could be in the range of 60 to 80 euros, considering that the condition is good and that the hammer price history for similar coins supports this estimate.

Therefore, a reasonable maximum purchase price could be 70 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 75 (MBC), which is a fairly good state. This suggests that its value could be in the mid-high range of previous auctions.

2. Previous Prices: Looking at previous auction prices for coins with a similar condition (75), we see that they have ranged between 9 and 25 euros. The average hammer price for coins with a condition of 75 has been approximately 12 to 20 euros.

3. Average Hammer Price: The average hammer price for this particular coin has been 19.25 euros, indicating that in the past it has reached prices close to this value.

4. Recent Trends: In the most recent auctions, hammer prices have shown a range of 12 to 30 euros for similar conditions, suggesting that there is growing interest in this coin.

5. Starting Price: The starting price is 9 euros, which is relatively low compared to previous hammer prices.

Taking all these factors into account, an estimated maximum purchase price for this coin could be around 25 euros. This is based on recent interest and previous hammer prices for coins of similar condition.

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 75 (MBC), which indicates that it is in fairly good shape, but not among the best qualities (FDC).

2. Auction History:
- The average hammer price for similar coins has been 68.55 euros.
- In the past, coins with similar conditions (around 70-80) have been auctioned and reached varying hammer prices, but some examples are:
- A coin with a condition of 80 was sold for 60 euros.
- Another with a condition of 80 was sold for 90 euros.
- A coin with a condition of 95 was sold for 400 euros, but that is an exceptional case.

3. Starting Price and Estimates:
- The current starting price is 18 euros, which is quite low compared to the average hammer price.
- The average starting price for similar coins is 41.7 euros, suggesting that the starting price might be conservative.

4. Recent Trends:
- In the most recent auctions, hammer prices have ranged from 40 to 90 euros for similar conditions.

Based on these factors, an estimated maximum purchase price for this coin could be between 70 and 90 euros, considering that the condition is good and that the auction history shows that coins in similar conditions have reached those prices.

Therefore, a reasonable maximum purchase price could be 85 euros.

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

1. Current Condition: The coin has a condition rating of 75 (MBC), indicating 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 a similar condition (75), we can see that they have reached auction prices that vary, but generally fall within a range of 51 to 220 euros.

3. Average Auction Price: The average auction price for this coin is 122.95 euros, which can serve as a good indicator of market value.

4. Current Starting Price: The starting price is 40 euros, which is relatively low compared to previous auction prices.

5. Auction Trends: The coin has been auctioned 26 times, of which 21 have been sold. This indicates a consistent interest in the coin, which may influence its price.

Given all this, an estimated maximum purchase price could be in the range of 150 to 200 euros, considering that the condition is good and that previous auction prices have reached higher figures. However, since the starting price is 40 euros, it is likely that the final auction price will not significantly exceed the average auction price of 122.95 euros.

Therefore, a reasonable maximum purchase price could be 180 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 30 (BC+), indicating that it is not in the best condition. This may negatively affect its value compared to coins in better condition.

2. Auction History:
- The coin has been auctioned 9 times, of which it has sold 6 times. This indicates moderate interest in the coin.
- Previous hammer prices have varied, but there are some hammer prices close to 30 euros, such as in the auctions of 2023 and 2017.

3. Starting Price and Average Hammer Price:
- The current starting price is 30 euros, and the average hammer price in the past has been approximately 26.17 euros. This suggests that the starting price is reasonable, but it may not sell for much more than that.

4. Price Trends:
- Estimated prices in previous auctions have been higher than the hammer prices, suggesting that buyers may be willing to pay more than what it ultimately sells for.

5. Comparison with Previous Prices:
- In previous auctions, the hammer price has reached up to 40 euros under similar conditions, although this is not common.

Taking all these factors into account, an estimated maximum purchase price could be around 35-40 euros. This is based on the historical interest in the coin and the fact that the starting price is reasonable, but it should also be considered that the condition is not the best. Therefore, a price of 35 euros could be a good starting point for an offer.