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. Auction History: By looking at previous hammer prices for coins with a similar condition (95), we can see that they have reached significantly higher prices. For example, in past auctions, coins with a condition of 95 have reached hammer prices of up to 380 euros.

3. Starting Price and Average Prices: The current starting price is 75 euros, and the average hammer price in the past has been 51.7 euros. However, since the condition of this coin is above average, it is reasonable to expect that the hammer price will be higher.

4. Recent Trends: In the most recent auctions, hammer prices for coins of similar condition have shown an increase, suggesting that interest in these coins is growing.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 150 to 200 euros. This is based on the potential of the condition and market interest, as well as previous hammer prices for coins of similar quality.