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 of 75 (MBC), indicating that it is in relatively good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous Prices: By looking at previous auction prices for coins with similar conditions, we can see that:
- In 2018, a coin with a condition of 90 was auctioned for 120 euros.
- In 2022, a coin with a condition of 70 was auctioned for 100 euros.
- In 2023, a coin with a condition of 95 was auctioned for 240 euros.

3. Average Auction Price: The average auction price for this coin is 92.97 euros, which provides a good reference point.

4. Auction Trends: The coin has been auctioned 41 times, of which 36 have sold. This indicates good demand and sustained interest in the coin.

5. Starting Price: The starting price is 60 euros, which is a good starting point, but given the auction price history, it is likely that the final price will be significantly higher.

Considering all these factors, an estimated maximum purchase price for this coin could be between 120 and 150 euros, taking into account its condition and the auction price history of similar coins. This would allow for competitive bidding without exceeding a reasonable limit based on historical data.