Based on the provided data, we can observe that the coin in question had a starting price of 25 euros in the most recent auction, with a conservation grade of 85 (ebc-). Additionally, it has been auctioned 14 times in the past, being sold in 8 of those instances.

The average starting price of previous auctions has been 23.63 euros, while the average final price has been 79.13 euros. Looking at the past selling prices of this coin, we can see that it has reached final prices of up to 300 euros in the past.

Given the coin's good conservation grade (85 ebc-) and considering its past selling prices, as well as the fact that it has sold in the majority of past auctions, we could estimate a maximum buying price of around 150-200 euros for this coin in the next auction. It is important to note that the final price will depend on the demand at the time of the auction and other factors that may influence collectors' valuation.