Based on the data provided, we can observe that the coin in question has had an average auction closing price of 68.82 euros in previous auctions. Additionally, the condition of this coin has been described as 75 (VF).

Considering that the starting price for the next auction is 12 euros and the historical average starting price is 55.33 euros, we can see that the closing price has consistently been higher than the starting price in previous auctions.

Given that the condition of the coin is 75 (VF), and considering that closing prices of up to 110 euros have been achieved in previous auctions, we could estimate a maximum purchase price of around 100 euros for this coin in the next auction. This is considering that the coin is in a medium condition of preservation and that previous closing prices have been higher than the starting price.