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 80 (MS+), indicating that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Auction History:
- The coin has been auctioned 11 times, of which it has sold 4 times. This suggests that there is moderate interest in the coin.
- The average hammer price in previous auctions is 52.47 euros, which can serve as a good indicator of market value.

3. Starting and Hammer Prices:
- Starting prices have varied, but there are examples of hammer prices exceeding the starting price, indicating that buyers are willing to pay more in some cases.
- The current starting price is 50 euros, which is slightly below the average hammer price.

4. Price Trends:
- In previous auctions, hammer prices have ranged between 45 and 61.88 euros, suggesting that the hammer price may be in a similar range.

Based on these factors, an estimated maximum purchase price could be around 60-65 euros. This is based on the hammer price history and the good condition of the coin. However, it is important to note that collector interest and competition in the auction can also influence the final price.

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

2. Previous Prices:
- In 2013, a coin with a condition of 90 sold for 11,254.63 euros.
- In 2014, a coin with a condition of 50 sold for 4,100 euros.
- In 2021, another coin with a condition of 90 sold for 6,952.57 euros.

3. Average Hammer Price: The average hammer price for this reference is 5,951.80 euros, which gives us an idea of the market value.

4. Current Starting Price: The current starting price is 900 euros, which is significantly lower than the previous hammer prices.

Given that the condition of the coin is 75, which is better than 50 but lower than 90, we can estimate that its value should be between the hammer prices of coins with conditions of 50 and 90.

We can make an approximate calculation considering that the price of a coin with a condition of 75 could be in an intermediate range. One approach could be to take a weighted average of the previous hammer prices, adjusting for condition:

- Hammer price for condition 90: 11,254.63 and 6,952.57 (average: 9,103.60)
- Hammer price for condition 50: 4,100

We can estimate that a coin with a condition of 75 could have an approximate value of:

\[
\text{Estimated Price} = \frac{(9,103.60 + 4,100)}{2} \approx 6,601.80
\]

However, since the average hammer price is 5,951.80 euros, and considering that the condition is not the best, a reasonable maximum purchase price could be slightly lower than this average.

Therefore, an estimated maximum purchase price for this coin could be around 6,000 to 7,000 euros.

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 of 80 (MBC+), which indicates that it is in fairly good shape, although it is not the best possible condition.

2. Previous prices:
- In 2011, a coin with a condition of 90 sold for 170 euros and 115 euros at different auctions.
- In 2014, another coin with unspecified condition (but likely similar) sold for 130 euros.

3. Average hammer price: The average hammer price for this coin is 120 euros, suggesting that, in general, coins of this reference tend to sell around this price.

4. Starting price: The starting price is 60 euros, which may attract more bidders, but does not necessarily indicate the final hammer price.

Given that the condition of the coin is 80 (MBC+), which is lower than the conditions of 90 that have sold in the past, it is reasonable to adjust the estimated price downward compared to previous hammer prices.

Taking all these factors into account, an estimated maximum purchase price could be around 100-110 euros. This is based on the fact that, although the condition is good, it is not the best, and the average hammer price suggests that there could be competition, but not at the level of the higher conditions.

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: 80 euros.
2. Coin condition: 70 (MBC-), which is an acceptable condition, but not excellent.
3. Auction history:
- It has been auctioned 7 times in the past, of which it has sold 4 times.
- The average starting price in previous auctions is 332.49 euros, and the average hammer price is 196.15 euros.
4. Previous prices:
- In 2012, it sold for 120 euros with a condition of 80.
- In 2016, it sold for 254.59 euros with a condition of 80.
- In 2022, it was estimated at a price of 475.55 euros with a condition of 85, although it did not sell.

Given that the current condition of the coin is 70, which is lower than the conditions of 80 and 85 from previous auctions, it is reasonable to expect that the hammer price will not reach the higher levels observed in the past.

However, the current starting price is 80 euros, suggesting that the seller has expectations for the coin to sell at a reasonable price.

Considering the price history and the current condition, an estimated maximum purchase price could be in the range of 100 to 150 euros. This is based on the fact that, although the condition is not the best, there is a history of hammer prices that suggests the coin has significant value.

Therefore, an estimated maximum purchase price could be 120 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 indicates that it is in fairly good shape, but not the best possible condition.

2. Previous Auction Prices:
- In 2015, a coin with the same condition (75) sold for 1103.45 euros.
- In 2016, a coin with better condition (85) sold for 2598.18 euros.
- The starting and final prices in previous auctions varied significantly, indicating that interest and demand can influence the final price.

3. Average Starting and Final Prices:
- The average starting price is 369.49 euros, and the average final price is 1074.51 euros. This suggests that, in general, coins of this reference tend to reach final prices significantly higher than their starting price.

4. Sales Trends: The coin has sold in 4 out of the last 5 auctions, indicating a consistent interest in this reference.

Given all this, and considering that the condition of the coin is 75, an estimated maximum purchase price could be in a range between the average final price and the highest price reached in previous auctions.

Therefore, an estimated maximum purchase price could be around 1000 to 1200 euros. This is based on historical interest and the final prices of similar coins in comparable conditions.

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), indicating that it is in an acceptable state, but not among the best qualities.

2. Starting Price and Hammer Price: The current starting price is 75 euros, and the average hammer price in previous auctions is 141.96 euros. This suggests that, in general, coins of this reference tend to sell for a significantly higher price than their starting price.

3. Auction History:
- In the past, there have been auctions with hammer prices that varied considerably. For example, in 2015, a coin with a similar condition sold for 160 euros.
- There are also examples of coins with a condition of 75 that have sold for prices ranging from 50-100 euros in previous auctions.

4. Sales Trends: Of the 16 times it has been auctioned, it has sold 10 times, indicating a reasonable sell-through rate. However, there is also a significant number of times it has not sold (6), which may indicate that interest can vary.

5. Average Starting Price: The average starting price of 137.98 euros is a good indicator of what buyers are willing to pay on average.

Based on these factors, an estimated maximum purchase price could be between 120 and 160 euros, considering that the condition is 75 and that the average hammer price in the past has been approximately 141.96 euros.

Therefore, a reasonable maximum purchase price could be 150 euros. This allows for a margin to compete in the auction, given the history of hammer prices and the 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 of 75 (MBC), which indicates that it is in fairly good shape, but not of the highest quality.

2. Starting Price: The starting price is 60 euros, which can be a good starting point for the auction.

3. Historical Prices: By looking at previous auction prices for coins with a similar condition (75), we can see that they have varied quite a bit. Some examples include:
- In 2011, a coin with a condition of 75 was auctioned for 200 euros.
- In 2013, another coin with a condition of 75 sold for 200 euros.
- In 2016, a coin with a condition of 75 was auctioned for 170 euros.

4. Average Auction Price: The average auction price for this coin is 189.62 euros, suggesting that, in general, buyers are willing to pay close to this amount.

5. Recent Trends: In the most recent auctions, the hammer prices have ranged from 80 to 140 euros for similar conditions, indicating that interest may be fluctuating.

Based on these factors, an estimated maximum purchase price for this coin could be between 180 and 220 euros. This is based on the average auction price and the hammer prices of coins with similar conditions in the past.

Therefore, a reasonable maximum purchase price could be 200 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 80 (MS+), indicating that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Auction History:
- The average hammer price for similar coins has been 80.12 euros.
- In previous auctions, we have seen hammer prices ranging from 46 euros to 160 euros, depending on the condition and other factors.
- The last auction with a condition of 80 had a hammer price of 80 euros.

3. Starting Price: The starting price is 50 euros, which can be a good indicator of the sales expectation, but not necessarily of the final price.

4. Price Trends: In recent auctions, hammer prices for coins with similar conditions have been around 80-100 euros.

Based on this data, an estimated maximum purchase price could be in the range of 90 to 110 euros, considering that the condition is good and that the price history shows that coins in similar conditions have reached hammer prices in that range.

Therefore, a reasonable estimated maximum purchase price could be 100 euros.

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 80 (MBC+), indicating that it is in quite good shape. This generally translates to a higher price compared to coins in lower conditions.

2. Auction History:
- The average hammer price for this coin in the past is 75.42 euros.
- In previous auctions, hammer prices have varied, with some reaching up to 170 euros in superior conditions (such as in the December 2023 auction with a condition of 95).
- The most recent auction with a condition of 80 had a hammer price of 70 euros.

3. Starting Price and Average Starting Price:
- The current starting price is 50 euros, which is slightly higher than the average starting price of 47 euros. This may indicate an expectation that the coin will sell for a higher price.

4. Price Trends:
- Observing the trends, it seems that coins in similar conditions have had hammer prices ranging between 70 and 80 euros in recent auctions.

Based on these factors, an estimated maximum purchase price for this coin could be between 80 and 100 euros. This is because, although the starting price is 50 euros, the condition and price history suggest that it could reach a higher price at auction.

Therefore, a reasonable maximum purchase price could be 90 euros.