To estimate a maximum purchase price for the coin in question, we can 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 with lower conditions.

2. Auction history: By looking at previous hammer prices for coins with a similar condition (95), we can see that they have reached hammer prices of up to 75 euros in recent auctions. For example, at the auction on November 11, 2021, a coin with a condition of 95 was sold for 75 euros.

3. Average hammer price: The average hammer price for this coin is 34.82 euros, but given the high condition, we can expect the actual hammer price to be above this average.

4. Starting prices and estimates: The current starting price is 18 euros, and the average starting price is 24.1 euros. However, given the hammer price history and the condition, it is reasonable to expect the hammer price to be in a higher range.

5. Recent trends: In the most recent auctions, hammer prices for coins of similar condition have shown an increase, suggesting that demand may be growing.

Based on these factors, an estimated maximum purchase price for this coin could be between 70 and 80 euros, considering that the condition is high and there is a hammer price history that supports this estimate.