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 shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous Prices: By observing the hammer prices of coins with a similar condition (95), we can see that they have reached hammer prices of up to 320 euros in previous auctions. For example, at the auction on March 14, 2024, a coin with a condition of 95 was sold for 340 euros.

3. Average Hammer Price: The average hammer price for this coin is 99.5 euros, but given the high condition, we can expect the actual hammer price to be above this average.

4. Starting Price: The starting price of 125 euros is a good indicator that the seller expects a reasonable price, but not necessarily the final price.

5. Auction Trends: The coin has been auctioned 161 times, with an 84% sell-through rate (135 times sold). This suggests that there is consistent interest in this coin, which may increase its value at auction.

Based on these factors, an estimated maximum purchase price could be between 250 and 350 euros, considering that the condition is high and there are precedents for hammer prices in that range. A price of 300 euros could be a reasonable target for a maximum bid, given the auction history and the condition of the coin.