Based on the data provided, we can observe that the coin has had an average auction closing price of 85.32 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 85.32 euros, we can estimate a maximum purchase price for this coin in the upcoming auction. Given that the condition is good but not excellent, and the average closing price has been relatively high, we could consider an estimated maximum purchase price around 90-95 euros.

It is important to note that the final auction price may vary depending on the demand at that specific time, so it is advisable to stay alert during the auction and adjust the offer accordingly.