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 95 (EF+), indicating that it is in very good shape. This generally translates to a higher price compared to coins in lower conditions.

2. Current Starting Price and Previous Prices: The current starting price is 350 euros. In previous auctions, we have seen hammer prices that vary significantly, but there are examples of coins with similar conditions that have sold for higher prices. For instance, in 2019, a coin with a condition of 95 sold for 300 euros, and in 2022, another with the same condition sold for 120 euros.

3. Price Trends: The average hammer price for similar coins is 171.13 euros, but there are examples of auctions that exceed 300 euros. This suggests that there is potential for the coin to reach a higher price in the current auction.

4. Analysis of Hammer Prices: By observing the hammer prices of coins with similar conditions, we can see that there is a wide range. Coins with a condition of 95 have reached hammer prices of up to 460 euros in the past.

5. Final Estimate: Given that the coin's condition is high and considering previous hammer prices, an estimated maximum purchase price could be between 400 and 500 euros. This is based on the trend of hammer prices for coins of similar condition and the fact that the starting price is 350 euros.

Therefore, an estimated maximum purchase price for this coin could be 450 euros.