Based on the provided data, we can observe that the coin in question has had an average starting price of 39.78 euros in previous auctions, with an average closing price of 85.5 euros. Additionally, it has been auctioned a total of 9 times in the past, out of which it has been sold on 7 occasions.

The current estimated condition of the coin is 70 (VF+), indicating that it is in an acceptable but not excellent condition.

Considering the previous auction prices of the coin, its current condition, and the fact that the starting price this time is 25 euros, we could estimate a maximum purchase price around 90-100 euros. This estimation is based on the average closing price being 85.5 euros and taking into account the condition and historical demand for the coin.