To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially the current condition of the coin (95, EBC+) and the hammer prices from previous auctions.

1. Condition: The coin has a condition of 95, indicating that it is in very good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous hammer prices: Looking at the hammer prices of coins with similar conditions:
- In 2019, a coin with a condition of 90 sold for 4200 euros.
- In 2020, a coin with a condition of 70 sold for 320 euros.
- In 2014 and 2015, coins with a condition of 75 sold for 187.21 and 184.48 euros, respectively.

3. Average hammer price: The average hammer price of coins auctioned in the past is 895.63 euros, which can also serve as a reference.

4. Starting price: The current starting price is 1500 euros, indicating that the seller has expectations of a higher price.

Given that the condition of the coin is quite high (95), and considering the hammer prices of coins with lower conditions, it can be estimated that the hammer price could be in a higher range.

Estimated maximum purchase price: Based on the condition and previous hammer prices, a reasonable maximum purchase price could be between 2000 and 3000 euros. This is because, although the starting price is 1500 euros, the high condition and previous hammer prices suggest that it could reach a significantly higher price at auction.

Therefore, an estimated maximum purchase price could be 2500 euros.