To estimate a maximum purchase price for the coin in question, we can consider several factors based on the provided data:

1. Coin Condition: The coin has a condition rating of 80 (MBC+), indicating that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Auction History:
- The average hammer price for this coin in the past is 76.31 euros.
- The last auction of this coin with a similar condition (80) had a hammer price of 130 euros.
- In previous auctions, hammer prices have varied, but there are examples of sales reaching up to 180 euros.

3. Starting Price: The current starting price is 60 euros, which is below the historical average hammer price.

4. Price Trends: Given that the coin has been auctioned 79 times and has had a high sales percentage (74 out of 79), this suggests there is consistent interest in this coin.

Based on these factors, an estimated maximum purchase price could be in the range of 120 to 150 euros, considering that the condition is good and there are precedents for higher hammer prices in the past.

Therefore, a reasonable estimated maximum purchase price could be 150 euros.