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 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. Average Hammer Price: The average hammer price for this coin is 84.07 euros. This gives us a good reference for what buyers have been willing to pay in the past.

3. Auction History: By looking at previous hammer prices for coins with a similar condition (80), we can see that they have reached hammer prices that vary, but are generally in the range of 60 to 130 euros, depending on demand and other market factors.

4. Starting Price: The starting price of 60 euros is a good starting point, but since the average hammer price is significantly higher, it is reasonable to expect that the final hammer price will exceed the starting price.

5. Recent Trends: In the most recent auctions, hammer prices have shown a trend of being higher, especially for coins in good condition.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 100 to 120 euros. This range takes into account the good condition of the coin, the history of hammer prices, and market trends.