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: By observing the hammer prices from previous auctions, we can see that coins with lower conditions (30-80) have had hammer prices ranging from 80 to 210 euros. However, there is no hammer price data for coins with a condition above 80 in the most recent auctions.

3. Average hammer price: The average hammer price for previously auctioned coins is 191.42 euros, but this includes coins of various conditions. Given that the condition of the coin in question is significantly higher, we can expect the hammer price to be above this average.

4. Estimated price: In previous auctions, the estimated price for coins with lower conditions has been up to 225 euros. Since the condition of this coin is 95, it is reasonable to assume that the estimated price could be higher.

5. Starting price: The starting price is 450 euros, indicating that the seller has high expectations for this coin.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 250 to 300 euros, considering that the condition is high and that the starting price is significantly higher. However, the final price will depend on the demand at the auction and the competition among bidders.