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

1. Condition of the coin: The coin has a condition rating of 95 (EBC+), which indicates that it is in very good condition. This generally translates to a higher price compared to coins with lower condition ratings.

2. Auction history: By looking at previous hammer prices for coins with a similar condition (95), we can see that the hammer prices have varied but have reached significant figures. For example:
- In previous auctions, coins with a condition of 95 have reached hammer prices of up to 110 euros.
- The average hammer price for coins of similar condition seems to be around 60-90 euros.

3. Starting price and average hammer price: The current starting price is 40 euros, and the average hammer price in the past has been 43.77 euros. This suggests that the hammer price could be in a similar range or slightly higher.

4. Recent trends: In the most recent auctions, hammer prices for high-condition coins have shown a trend of increasing, which could indicate a growing market.

Based on these factors, an estimated maximum purchase price for this coin could be between 80 and 110 euros, considering its good condition and the history of hammer prices in previous auctions. A price of 100 euros could be a reasonable target for a competitive bid.