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

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

2. Previous auction prices: By observing the hammer prices of coins with similar conditions (95 and close), we can see that in the past, coins with a condition of 95 have reached hammer prices of up to 700 euros (as seen in the December 2021 auction).

3. Starting price and average prices: The current starting price is 250 euros, and the average hammer price in previous auctions is 96.63 euros. However, given that the condition of this coin is high, it is reasonable to expect that the hammer price will be above the average.

4. Auction trends: The coin has been auctioned 77 times, with a high percentage of sales (72 out of 77). This suggests that there is consistent interest in this coin, which may increase its value.

5. Comparison with previous starting and hammer prices: In previous auctions, coins with a condition of 95 have had starting prices that varied, but some have reached hammer prices of 420 euros (as seen in the February 2023 auction).

Based on these factors, an estimated maximum purchase price for this coin could be between 400 and 600 euros, considering its high condition and market interest. A price of 500 euros could be a reasonable benchmark for a competitive offer.