Based on the provided data, we can observe that the coin in question has had a starting price in previous auctions ranging from 18 to 60 euros, with estimated prices ranging from 30 to 100 euros. The average auction closing price has been 43 euros.

Considering that the coin's condition is 75 (VF), and taking into account the previous prices of similar auctions as well as the average closing price, we could estimate a maximum purchase price around 80-90 euros.

It is important to note that the final auction price will depend on the demand at that specific moment, so it is advisable to monitor its evolution to adjust the offer accordingly.