Based on the provided data, we can observe that the coin in question has had a starting price in the current auction of 12 euros and is in a conservation grade of 70 (MBC-). Additionally, it has been auctioned in the past 26 times, sold in 25 instances, and remained unsold once.

The average starting price of previous auctions has been 23.08 euros, while the average final price has been 44.92 euros. Regarding the previous prices of this coin, they have ranged from 6 euros to 60 euros, with estimates ranging from 9 euros to 80 euros.

Given that the conservation grade of the coin is 70 (MBC-) and considering the previous auction prices, as well as the current starting price and average final price, 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.