Based on the data provided, we can observe that the coin in question has had an average auction closing price of 285.44 euros in previous auctions. Additionally, the condition of the coin on this occasion is described as '75 (VF).'

Considering that the condition of the coin is '75 (VF)' and that the average auction closing price in previous auctions has been 285.44 euros, we could estimate a maximum purchase price around 300-320 euros for this coin in the upcoming auction.

It is important to note that the final auction price may vary depending on factors such as demand at that specific time, competition from other bidders, and the particular interest that this coin may generate in the auction in question.