Based on the data provided, we can observe that the coin in question has had an average auction closing price of 22.38 euros in previous auctions. Additionally, it has been auctioned a total of 22 times in the past, out of which it has been sold 17 times.

The current condition of the coin is 100 (UNC), indicating that it is in a condition very close to FDC (Mint State).

When analyzing the previous prices of the coin, we can see that there have been variations in starting prices, estimated prices, and closing prices throughout the auctions. However, the highest estimated price was 50 euros in an auction from 2018.

Given that the coin will be auctioned in the upcoming days and considering its price history, condition, and demand, a maximum estimated purchase price could be around 50-60 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 moment.