Based on the provided data, we can observe that the coin in question has had closing prices ranging from 12.12 euros to 150 euros in previous auctions. The current condition of the coin is 80 (VF+), indicating that it is in fairly good condition.

The average closing price of the coin in previous auctions has been 41.36 euros, while the average starting price has been 43.55 euros. However, the estimated purchase price in previous auctions has ranged between 20 euros and 75.44 euros.

Given that the coin will be auctioned in the coming days and considering its condition and previous prices, we could estimate a maximum purchase price around 80 euros. This is considering that the coin is in fairly good condition and that previous prices have reached that range.

It is important to note that the final auction price will depend on the demand at that specific moment, so it is advisable to pay attention to the auction to adjust the offer accordingly.