Based on the provided data, we can observe that the coin in question has had a starting price in the current auction of 45 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 40.96 euros, while the average final price has been 53.76 euros. In past auctions, the estimated price of the coin has ranged between 9 and 250 euros.

Given that the conservation grade of the coin is 80 (MBC+), and considering the previous prices of similar auctions, as well as the fact that it has sold in most instances in the past, we could estimate a maximum purchase price 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 the decision of potential buyers.