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 relatively good shape. This suggests that its value should be above that of coins in worse conditions.

2. Current Starting Price and Previous Prices: The current starting price is 60 euros, and the average hammer price in previous auctions is 197.1 euros. This indicates that, historically, the coin has had a significantly higher hammer value than its starting price.

3. Sales History: The coin has been auctioned 93 times, of which it has sold 63 times. This suggests that there is consistent interest in the coin, which may increase its value.

4. Previous Hammer Prices: Looking at previous hammer prices, there are several examples of prices exceeding 200 euros, with some reaching much higher prices (for example, 650.86 euros in 2013).

5. Recent Trends: In recent auctions, the hammer price has varied, but there are examples of hammer prices around 150-200 euros for coins in similar conditions.

Based on these factors, an estimated maximum purchase price could be in the range of 200 to 250 euros, considering that the coin is in acceptable condition and that interest in it appears to be consistent. However, given the history of hammer prices, it is possible that a buyer may be willing to pay more if demand is high at the time of the auction.

Therefore, a reasonable maximum purchase price could be 250 euros.