Based on the data provided, we can observe that the coin in question has had an average auction closing price of 39.1 euros in previous auctions. Additionally, the condition of this coin has been described as '75 (VF).'

Considering that the condition of the coin is 75 (VF) and the average closing price has been 39.1 euros, we can estimate a maximum purchase price around 45-50 euros. Given that the starting price in the upcoming auction is 12 euros, it is likely that the closing price will be above this value, but it is important to consider that the final price will depend on the demand at the auction and other potential interested buyers.