Based on the data provided, we can observe that the coin has had an average auction price of 99.6 euros in the past. Additionally, the condition of the coin in this auction is 75 (VF).

Considering that the historical average auction price is 99.6 euros and that the condition of the coin in this auction is 75 (VF), we could estimate a maximum purchase price around 110 euros. Since the condition of the coin is not excellent, it is prudent not to exceed the historical average auction price too much.

Therefore, an estimated maximum purchase price for this coin in the current auction could be around 110 euros.