To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially the previous auction prices and the current condition of the coin.

1. Current Condition: The coin has a condition rating of 75 (MBC), indicating that it is in quite good shape.

2. Previous Auction Prices: By looking at the auction prices of coins with a similar condition (75), we can see that they have varied, but generally, the auction prices for coins in this condition range have been around 70 to 130 euros.

3. Average Auction Price: The average auction price for this particular coin is 104.55 euros, which is also a good indicator.

4. Auction Trends: The coin has been auctioned 98 times, of which it has sold 92 times. This suggests good demand and consistent interest in the coin.

5. Starting Price: The starting price is 60 euros, which is reasonable, but given the auction price history, it seems there is potential for a higher auction price.

Based on these factors, an estimated maximum purchase price could be around 120-130 euros, considering that the condition is good and that the auction price history supports this figure. This also takes into account the possibility that some buyers may be willing to pay a bit more for a coin in good condition.