Based on the provided data, we can observe that the coin in question has had an average auction closing price of 41.61 euros in previous auctions. Additionally, its current condition is 85 (ebc-).

Considering that the coin's condition is quite good (85), and that the average auction closing price in previous auctions has been 41.61 euros, we could estimate a maximum purchase price around 45-50 euros. Since the coin will be auctioned in the upcoming days, it is possible that the closing price may be slightly higher due to demand at that time.

Therefore, an estimated maximum purchase price for this coin in the next auction could be around 45-50 euros.