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

1. Coin Condition: The coin to be auctioned has a condition of 80 (MBC+). This is an important factor, as coins in better condition tend to reach higher prices.

2. Price History: By observing previous hammer prices for coins with a similar condition (around 80), we can see that the hammer prices have varied. For example:
- In previous auctions, coins with a condition of 80 have reached hammer prices of up to 150 euros.
- There are also examples of coins with a condition of 75 that have sold for around 100 euros.

3. Average Hammer Price: The average hammer price for this particular coin has been 136.65 euros, indicating that, in general, buyers are willing to pay close to this amount.

4. Starting Price: The starting price is 60 euros, which is relatively low compared to previous hammer prices.

5. Recent Trends: In the most recent auctions, hammer prices for coins with similar conditions have shown an increase, suggesting that interest in these coins may be growing.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 150 to 180 euros. This is based on the hammer price history for coins of similar condition and the current market interest.