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

1. Current Condition: The coin is in a condition of 95 (EF+), which indicates that it is in very good shape. This generally translates to a higher price compared to coins in lower conditions.

2. Auction History:
- The average hammer price for similar coins in condition 95 has been approximately 22.13 euros.
- In previous auctions, we have seen hammer prices that vary, but there are examples of sales reaching up to 130 euros for coins in condition 100, indicating that there is a market willing to pay high prices for well-preserved coins.

3. Price Trends:
- In recent auctions, hammer prices for coins in condition 95 have been in the range of 20 to 30 euros, with some cases reaching up to 40 euros.

4. Starting Price and Estimates:
- The starting price is 12 euros, and the average starting price is 12.15 euros. This suggests that the market expects the coin to sell for a price higher than the starting price.

Based on these factors, an estimated maximum purchase price for the coin in condition 95 could be between 30 and 40 euros, considering that the market has shown a willingness to pay higher prices for coins in good condition. Therefore, a reasonable maximum purchase price could be 40 euros.