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 70 (MBC-). Additionally, it has been auctioned in the past on several occasions, with varying starting and final prices.

The average starting price of this coin in previous auctions has been 59.2 euros, while the average final price has been 51.5 euros. We can also see that it has had starting prices ranging between 6 and 225 euros in previous auctions.

Given that the current conservation grade of the coin is 70 (MBC-) and considering the starting and final prices of previous auctions, as well as the fact that it has sold in the past in most instances, we could estimate a maximum purchase price around 60-70 euros for this coin in the current auction. It is important to note that this is just an estimate and the final price could vary depending on the demand at the auction.