To estimate a maximum purchase price for the coin in question, we can consider several factors based on the provided data:

1. Coin Condition: The coin has a condition rating of 95 (EBC+), indicating that it is in very good condition. This generally translates to a higher value compared to coins with lower conditions.

2. Starting Price and Previous Prices: The current starting price is 125 euros. In the past, auction prices have varied, but there are examples of coins with similar conditions that have sold for higher prices. For instance, at the 2017 auction, a coin with a condition of 80 sold for 35 euros, and in 2022, another with a condition of 80 sold for 40 euros.

3. Price Trends: The average hammer price in previous auctions is 43.64 euros, but this includes coins of lower conditions. Given that the condition of the current coin is significantly better, we can expect the hammer price to be higher.

4. Analysis of Starting and Hammer Prices: The difference between the starting price and the average hammer price suggests that the starting price may be a bit higher than what has been seen in the past, but it also reflects the quality of the coin.

Considering all these factors, an estimated maximum purchase price could be in the range of 150 to 200 euros, taking into account that the condition is high and that interest in quality coins may lead to an increase in the hammer price. However, it is important to remember that the market can be unpredictable, and the final price will depend on demand at the auction.