Based on the provided data, we can observe that the coin in question has had a starting price in this 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 closing prices ranging between 18 and 190 euros.

The average starting price of previous auctions has been 37.67 euros, while the average closing price has been 50.64 euros. The coin has been sold in the past in 11 out of the 13 auctions it has participated in.

Considering this data, as well as the previous price history of the coin, we could estimate a maximum purchase price around 55-60 euros, taking into account the conservation grade of the coin and previous closing prices. It is important to note that the final price may vary depending on the demand at the auction and other factors that may influence the decision of potential buyers.