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

1. Condition: The coin has a condition rating of 95 (EF+), 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 1500 euros, which sets a baseline for the auction.

3. Price History: By looking at previous auction prices for similar coins, we can see that prices have varied significantly. For example, in past auctions, coins with similar conditions have reached hammer prices ranging from 500 to 3600 euros, depending on demand and other factors.

4. Average Hammer Price: The average hammer price for this coin is 553.6 euros, suggesting that, in general, coins of this reference tend to sell below the starting price.

5. Recent Trends: In the most recent auctions, hammer prices have shown a trend of increasing, especially for coins in good condition.

Given all this, an estimated maximum purchase price could be in the range of 1800 to 2200 euros, considering that the condition is high and there is potential interest in the coin. However, it is important to keep in mind that the final price will depend on the competition in the auction and the specific demand at that time.