Based on the provided data, we can observe that the coin in question has had a starting price in previous auctions ranging from 5 euros to 500 euros. The average starting price has been 85.96 euros, while the average final price has been 69.28 euros.

The current condition of the coin is 85 (ebc-), indicating that it is in fairly good condition.

Taking into account the previous auction prices of the coin, as well as its current condition, we can estimate a maximum purchase price of around 100-120 euros. However, considering that the starting price in previous auctions has reached up to 500 euros, it is important to note that the final price may vary depending on the demand in the current auction.