Based on the data provided, we can observe that the coin has had an average auction closing price of 33.29 euros in previous auctions. Additionally, the condition of the coin on this occasion is 75 (MBC).

Considering that the starting price in this auction is 12 euros and that the average starting price in previous auctions was 22.59 euros, we can see that the closing price has been significantly higher than the starting price in most previous auctions.

Given that the condition of the coin is 75 (MBC), and taking into account the history of previous closing prices, as well as the interest in the coin (auctioned 38 times in the past), we could estimate a maximum purchase price of around 40-45 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 demand at the auction.