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 from previous auctions for coins with similar conditions (around 90-95), we can see that the hammer prices have varied, but generally, coins in similar conditions have reached hammer prices ranging from 1800 to 2600 euros.

3. Average hammer price: The average hammer price for this coin is 1873.22 euros, which is also a good indicator of the expected value.

4. Starting price: The starting price is 1800 euros, suggesting that the seller expects the coin to sell for a reasonable price.

5. Recent trends: In the most recent auctions, hammer prices for coins of similar condition have been in the range of 2000 to 2600 euros.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 2400 to 2600 euros. This is based on the good condition of the coin and the hammer prices from previous auctions for similar coins.