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 fairly good shape, but not of the highest quality.

2. Historical Prices: By looking at previous auction prices for coins with similar conditions, we can see that:
- Coins with a condition rating of 70 to 80 have had auction prices ranging from 40 to 140 euros.
- The coin with a condition rating of 95 sold for 260 euros, but that is not directly comparable due to the difference in condition.

3. Average Auction Price: The average auction price for this coin is 131.06 euros, suggesting that, in general, buyers are willing to pay around this amount.

4. Starting Price and Previous Sales: The current starting price is 25 euros, and there have been 37 previous sales, indicating a consistent interest in the coin.

5. Recent Trends: In the most recent auctions, the hammer prices have varied, but there are examples of sales reaching up to 140 euros for similar conditions.

Based on these factors, an estimated maximum purchase price for the coin in its current state could be between 100 and 140 euros. This is because, although the condition is not the highest, the interest in the coin and previous auction prices suggest it could reach a competitive price at auction.

Therefore, a reasonable maximum purchase price could be 130 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 of 70 (VF-), indicating that it is in relatively good shape. This suggests that its value could be in the upper range of coins with a similar condition.

2. Auction History:
- The average hammer price for coins with a similar condition (70) has been approximately 46.42 euros.
- In previous auctions, the hammer prices for coins with a condition of 70 have varied, but the highest recorded price was 60 euros in a prior auction.

3. Starting Price and Average Starting Price: The current starting price is 35 euros, and the average starting price in the past has been 34.23 euros. This indicates that the current starting price is reasonable and aligns with historical trends.

4. Sales Trends: The coin has been sold in 26 out of the last 31 auctions, indicating good demand and consistent interest in this reference.

5. Maximum Price Estimate: Given that the average hammer price for coins of similar condition is 46.42 euros and the highest recorded price was 60 euros, a reasonable maximum purchase price could be in the range of 55 to 60 euros, considering that the condition is good and there is interest in the coin.

Conclusion: Based on these factors, an estimated maximum purchase price for the coin could be 55 to 60 euros.