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

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

2. Previous Auction Prices: By observing the hammer prices of coins with similar conditions (95 and 90), we can see that they have reached hammer prices that vary considerably. For example:
- In 2018, a coin with a condition of 95 was auctioned for 110 euros.
- In 2014, a coin with a condition of 95 was auctioned for 200 euros.
- In 2021, a coin with a condition of 95 was auctioned for 300 euros.

3. Starting Price and Average Hammer Price: The starting price of the coin is 90 euros, and the average hammer price of similar coins is 78.18 euros. However, given that the condition of this coin is high, it is reasonable to expect that the hammer price will be above average.

4. Auction Trends: The coin has been auctioned 39 times in the past, with an 89.74% sell-through rate (35 out of 39). This suggests that there is consistent interest in this coin.

Based on these factors, an estimated maximum purchase price could be between 150 and 250 euros, considering that the condition is high and there are precedents for hammer prices in that range. A price of 200 euros could be a reasonable target, given the auction history and the condition of the coin.