To estimate a maximum purchase price for the coin that will be auctioned, we will consider several factors:

1. Condition of the coin: The coin in question 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. Starting price: The starting price is 750 euros. This is the baseline for the auction.

3. Price history: By looking at previous auction prices for coins with a similar condition (95), we can see that they have reached hammer prices that vary, but some have gone up to 850 euros or more in recent auctions.

4. Price trends: The average hammer price for similar coins is 507.81 euros, but since this coin has a higher condition, it is reasonable to expect its hammer price to be above this average.

5. Recent hammer prices: In the most recent auction of a coin with a condition of 95, the hammer price was 800 euros. This suggests that the market is willing to pay higher prices for coins in excellent condition.

Based on these factors, an estimated maximum purchase price for this coin could be between 850 and 950 euros, considering that the condition is high and that interest in quality coins tends to be strong in the market. Therefore, a reasonable maximum purchase price could be 900 euros.