Based on the data provided, we can see that the coin in question has had an average auction price of 329.64 euros in previous auctions. Additionally, the current condition of the coin is 85 (VF+/XF-).

Considering that the average auction price has been 329.64 euros and that the condition of the coin is quite good (85), we could estimate a maximum purchase price around 350-400 euros. Since the coin will be auctioned in the coming days, the auction price may be higher due to demand at the auction.

Therefore, an estimated maximum purchase price for this coin in its current condition could be around 350-400 euros.