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

1. Current Condition: The coin has a condition of 75 (MBC), indicating a medium-good quality. This generally translates to a higher price compared to coins of lower condition.

2. Auction History:
- The average hammer price for similar coins in the past is 95.65 euros.
- The coin has been auctioned 25 times, of which it has sold 24 times, indicating good demand.
- Previous hammer prices for coins with a similar condition (75) have varied, but there are examples of auctions reaching up to 110 euros.

3. Starting Price and Average Starting Price:
- The current starting price is 40 euros, which is relatively low compared to the average hammer price.
- The average starting price of 67.63 euros also suggests that the current starting price is attractive.

4. Recent Trends:
- In the most recent auctions, hammer prices have shown a range that can reach up to 110 euros for coins of similar condition.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 100 to 120 euros. This is based on the current condition, the auction price history, and the demand observed in previous auctions.