Based on the data provided, we can observe that the coin in question has performed well in previous auctions, with final prices greatly exceeding the starting and estimated prices. The coin's condition is rated at 85 (VF+/EF-), which is quite good.

The average final auction price for the coin in previous auctions has been 69 euros, with an average starting price of 32.93 euros. However, in some previous auctions, the final price has reached as high as 176 euros.

Considering that the coin will be auctioned in the upcoming days with a starting price of 60 euros and taking into account its auction history, condition, and demand, we could estimate a maximum purchase price around 150-180 euros. This estimation is based on the fact that in previous auctions, the final price has significantly surpassed the starting and estimated prices, sometimes even doubling them.

Therefore, an estimated maximum purchase price for this coin in the next auction could be around 150-180 euros. It is important to note that the final price will depend on the competition in the auction and the interest of potential buyers at that specific time.