Based on the data provided, we can observe that the coin in question had an opening price in this auction of 12 euros, with a conservation grade of 30 (BC+). Additionally, it has been auctioned in the past on seven occasions, with an average starting price of 32.57 euros and an average closing price of 49.14 euros.

When analyzing the previous prices of this coin, we see that it has had a fairly wide price range, from 9 euros to 110 euros in previous auctions. The maximum estimated purchase price has been set at 200 euros in one of the past auctions.

Considering this data, as well as the current conservation of the coin and its price history, we could estimate a maximum purchase price around 180-200 euros. It is important to note that the final price will depend on the demand at the auction and other factors that may influence the decision of potential buyers.