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 price compared to coins with lower conditions.

2. Price History: By looking at previous auction prices for coins with a similar condition (95), we can see that auction prices have varied, but there are examples of auctions reaching up to 70 euros in similar conditions.

3. Starting Price and Average Hammer Price: The current starting price is 25 euros, and the average hammer price in the past has been 27.36 euros. This suggests that the market is willing to pay a little more than the starting price.

4. Recent Trends: In the most recent auctions, hammer prices for coins of similar condition have shown an increase, which could indicate a rising trend in interest for these coins.

Based on these factors, an estimated maximum purchase price for this coin could be between 60 and 80 euros, considering that the condition is high and there is a price history that supports this estimate. However, it is important to keep in mind that the final price may vary depending on competition in the auction and demand at the time of sale.