Based on the data provided, we can observe that the coin in question has had a starting price in the current auction of 25 euros and is in a conservation grade of 80 (MBC+). Additionally, it has been auctioned in the past on several occasions, with varying starting and final prices.

The average starting price of the coin in previous auctions has been 34.08 euros, while the average final price has been 64.67 euros. Regarding the previous prices of this coin, we can see that they have ranged from 9 euros to 110 euros, with estimates ranging from 15 euros to 200 euros.

Given that the current conservation grade of the coin is 80 (MBC+), and considering the previous prices and auction trends, we could estimate a maximum purchase price of around 70-80 euros for this coin in the current auction. It is important to note that the final price may vary depending on the demand at the auction and other factors that may influence buyers' decisions.