Based on the data provided, we can observe that the coin in question has had an average auction closing price of 80.83 euros in previous auctions. Additionally, its condition has been maintained at a level of 75 (VF) in past auctions.

Considering that the starting price in the upcoming auction is 40 euros and the average closing price has been 80.83 euros, we could estimate a maximum purchase price around 80-85 euros, taking into account that the closing price has consistently been higher than the starting price in previous auctions.

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 monitor the auction's progress to adjust the offer accordingly.