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

1. 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 auction prices: By looking at the hammer prices of coins with a similar condition (95), we can see that they have reached hammer prices that vary, but are generally in the range of 385 to 500 euros in recent auctions.

3. Starting price and average hammer price: The current starting price is 375 euros, and the average hammer price in the past has been 317.16 euros. However, given the high condition, it is reasonable to expect that the hammer price will be above the average.

4. Recent trends: In the most recent auctions, the hammer price has been around 440 euros, suggesting that there is an upward trend in the value of this coin.

Based on these factors, an estimated maximum purchase price could be in the range of 450 to 500 euros, considering that the condition is high and that recent hammer prices have been favorable. Therefore, a reasonable maximum purchase price could be 500 euros.