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

1. Coin Condition: The coin to be auctioned has a condition of 95 (S/C-), indicating that it is in very good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous Prices: By observing the hammer prices of coins with a similar condition (95), we can see that in previous auctions, the hammer prices have varied. For example:
- In a 2022 auction, a coin with a condition of 95 was sold for 650 euros.
- In another auction in 2023, the hammer price was 450 euros.

3. Starting Price and Average Hammer Price: The current starting price is 450 euros, and the average hammer price for this coin in the past has been approximately 109.96 euros. However, given the high condition, it is likely that the hammer price will be significantly higher.

4. Auction Trends: The coin has been auctioned 74 times, of which it has sold 59 times. This indicates a consistent interest in the coin, which may influence the price.

5. Comparison with Starting and Hammer Prices of Other Coins: The average starting price of 81.49 euros and the average hammer price of 109.96 euros are quite low compared to the current starting price of 450 euros, suggesting that this coin has a higher perceived value.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 600 to 700 euros, considering its high condition and previous hammer prices for similar coins. However, the final price will depend on the competition in the auction and the interest of other bidders.