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

1. Current Condition: The coin has a condition rating of 85 (ebc-), indicating that it is in fairly good shape, but not the best possible condition.

2. Current Starting Price and Previous Prices: The current starting price is 1500 euros. In previous auctions, hammer prices have varied, but there are examples of hammer prices exceeding 2000 euros for coins with similar or better conditions.

3. Average Hammer Price: The average hammer price for this coin is 1391.62 euros, suggesting that, in general, coins of this reference tend to sell below their starting price.

4. Recent Trends: In the most recent auctions, we have seen hammer prices reaching up to 2200 euros, indicating significant interest in this coin.

5. Comparison with Previous Prices: Looking at the hammer prices of coins with similar conditions (around 80-95), the range of hammer prices has been quite broad, but the highest prices have been in the range of 2000-2500 euros.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 1800 to 2200 euros. This takes into account the current condition, interest in the coin, and previous hammer prices. However, since the starting price is 1500 euros, it is likely that buyers will be willing to bid more, especially if there is competition in the auction.