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

1. Current 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. Current Listing Price and Previous Prices: The current listing price is 1500 euros, which is higher than the average listing price of 944.12 euros. However, the average hammer price is 1318.58 euros, suggesting that similar coins have had hammer prices around this value.

3. Sales History: The coin has been auctioned 20 times, of which it has sold 19 times. This indicates high demand and good interest in the coin.

4. Previous Hammer Prices: Looking at previous hammer prices, the highest was 1200 euros for a condition of 90, and there are hammer prices of 1040 euros and 1300 euros for conditions of 80 and 70, respectively. This suggests that the hammer price can vary, but generally remains below 1500 euros.

5. Recent Trends: In the most recent auctions, the hammer price has been 1600 euros for a condition of 70, indicating that there is potential for the hammer price of better-conditioned coins (like the one rated 95) to be higher.

Taking all these factors into account, an estimated maximum purchase price for this coin could be around 1600-1800 euros, considering its high condition and the demonstrated interest in previous auctions. However, it is important to note that the final price will depend on the competition in the auction and the willingness of other bidders.