Based on the data provided, we can observe that the coin has had an average auction price of 36.72 euros in the past. Additionally, the current condition of the coin is 85 (VF+/XF-).

Considering that the coin will be auctioned in euros and that its condition is quite good, we could estimate a maximum purchase price around 100 euros. This is based on the historical average auction price of 36.72 euros, but taking into account the current condition and potential demand at the auction, a price of around 100 euros could be reasonable.

It is important to note that the final auction price will depend on several factors, such as the demand at that specific time, competition from other bidders, and the willingness of buyers to pay a higher price for a coin in good condition.