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

1. Coin Condition: The coin has a condition rating of 95 (EBC+), indicating that it is in very good shape. This generally translates to a higher value compared to coins with lower conditions.

2. Previous Auction Prices: By looking at the hammer prices of coins with similar conditions (around 90-95), we can see that they have reached hammer prices that vary considerably. For example:
- In 2019, a coin with a condition of 90 sold for 370 euros.
- In 2022, a coin with a condition of 95 sold for 250 euros.

3. Starting Price and Average Hammer Price: The current starting price is 250 euros, and the average hammer price in previous auctions is 72.48 euros. However, given that the condition of this coin is high, it is reasonable to expect that the hammer price will be above the average.

4. Auction Trends: The coin has been auctioned 104 times in the past, with a high sales percentage (97 out of 104). This suggests that there is consistent interest in this coin, which may increase its value.

5. Estimated Prices in Recent Auctions: In recent auctions, the estimated prices for coins of similar condition have been significantly higher, suggesting that the market is willing to pay more for coins in good condition.

Based on these factors, an estimated maximum purchase price for this coin could be between 300 and 400 euros, considering its high condition and market interest. However, since the starting price is 250 euros, it is possible that the final hammer price will be closer to this upper range, especially if there is competition among bidders.