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

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

2. Auction history:
- The average hammer price for similar coins in the past has been 43.41 euros.
- In previous auctions, coins with a similar condition (95) have reached hammer prices that vary, but some have gone for 100 euros or more, as seen in the auction on 2020-05-26.

3. Starting price and estimates:
- The current starting price is 25 euros, which is relatively low compared to previous hammer prices.
- The average starting price of 33.07 euros also suggests that the current starting price is competitive.

4. Demand and supply: The coin has been auctioned 126 times, with an 81% sell-through rate, indicating good demand.

Based on these factors, an estimated maximum purchase price could be between 80 and 100 euros, considering that the condition is high and there is a history of hammer prices that supports this estimate. Therefore, a reasonable maximum purchase price could be 90 euros.