Based on the data provided, we can observe that the coin has had an average auction closing price of 80.03 euros in previous auctions. Additionally, the condition of the coin on this occasion is 75 (VF).

Considering that the coin will be auctioned in the coming days and has had an average starting price of 57.75 euros, we can estimate a maximum purchase price based on the previous average closing price and the current condition. Given that the condition is 75 (VF), which is a good condition but not excellent, and that the previous average closing price was 80.03 euros, we could consider a maximum purchase price around 85-90 euros.

It is important to note that the final auction price may vary depending on the demand at that specific moment, so it is advisable to pay attention to the auction to adjust the offer accordingly.