Based on the provided data, we can observe that the coin in question had a starting price of 60 euros in the most recent auction and is in a conservation grade of 80 (MBC+). Additionally, it has been auctioned 46 times in the past, with an average starting price of 89.41 euros and an average closing price of 176.23 euros.

When analyzing the previous prices of this coin, we can see that it has had significant variations in its starting, estimated, and closing prices throughout past auctions. However, in the last recorded auction, the coin was sold for 850 euros, indicating a considerable increase in its value.

Considering these data points and taking into account the coin's conservation grade, as well as its price history, we could estimate a maximum purchase price of around 900 euros for this coin in the next auction. It is important to note that the final price may vary depending on demand and other factors in the auction.