Based on the provided data, 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 36 times in the past, sold in 33 instances, and remained unsold in 3 instances.

The average starting price of the coin in previous auctions has been 39.85 euros, while the average final price has been 54.61 euros.

Analyzing the previous prices of this coin, we can see that it has had variations in its starting, estimated, and final prices over the years. However, in recent auctions, the final prices have been around 40-50 euros.

Given the good conservation grade of the coin (80 MBC+) and considering the previous final prices, as well as the current starting price of 25 euros, we could estimate a maximum purchase price of around 50-60 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.