Based on the data provided, we can observe that the coin in question has had an average auction price of 36.08 euros in previous auctions. Additionally, its current condition is 80 (VF+).

Considering that the condition is quite good and the average auction price has been 36.08 euros, we could estimate a maximum purchase price around that value or slightly higher, taking into account that the coin will be auctioned in the coming days and its starting price is 15 euros.

Therefore, an estimated maximum purchase price for this coin could be around 40-45 euros. It is important to note that the final price will depend on the demand at the auction and other potential interested buyers.