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 very good condition.

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 closing price recorded was 50 euros in an auction held in 2017.

Given that the coin will be auctioned in the coming days and considering its price history, condition, and demand, we could estimate a maximum purchase price around 55-60 euros. This takes into account the highest price reached in previous auctions and the good condition of the current coin.