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 80 (MBC+). This is an important factor, as coins in better condition tend to reach higher prices at auctions.

2. Previous Hammer Prices: By observing previous hammer prices, we can see that in past auctions, coins with similar conditions have reached hammer prices that varied considerably. For example:
- In 2018, a coin with a condition of 90 sold for 650 euros.
- In 2023, a coin with a condition of 75 sold for 199 euros.
- In 2022, coins with a condition of 80 sold for 120 euros.

3. Average Hammer Price: The average hammer price for this coin is 180.13 euros, indicating that, in general, coins of this reference tend to sell for relatively high prices.

4. Starting Price and Average Starting Price: The current starting price is 60 euros, and the average starting price is 68.89 euros. This suggests that the starting price is reasonable, but it also indicates that there is potential for the hammer price to be significantly higher.

5. Auction Trends: Given that it has been auctioned 11 times in the past and 8 of those have sold, there is a good sell-through rate, suggesting that there is interest in this coin.

Based on these factors, an estimated maximum purchase price could be in the range of 180 to 250 euros, considering that the condition is good and there is a history of hammer prices that supports this estimate. A price of 200 euros could be a reasonable target, as it falls in the middle of previous hammer prices and reflects the current condition of the coin.