Based on the data provided, we can observe that the coin in question had a starting price of 30 euros in this auction, with a condition of 25 (BC). Additionally, it has been auctioned in the past five times, always selling, with an average starting price of 106 euros and an average closing price of 216 euros.

When analyzing the previous prices of this coin, we can see that it has had different starting, estimated, and closing values in previous auctions. The condition of the coin has remained constant at 75 in previous auctions.

Given that the coin has sold in all previous auctions, and considering its condition is 25 (BC), we could estimate a maximum purchase price around 250-300 euros, considering the average closing price in previous auctions and the fact that the coin has consistently sold in the past. However, it is important to note that the final price will depend on the demand in the current auction and other potential interested buyers.