Based on the data provided, we can observe that the coin has had an average auction closing price of 33.1 euros in previous auctions. Additionally, the current condition of the coin is 80 (VF+).

Considering that the coin will be auctioned in the upcoming days and has had an average starting price of 18.07 euros, we can estimate that the closing price could be around that range or even higher, taking into account the upward trend in closing prices in previous auctions.

Given the good condition of the coin (80 VF+), and considering the history of previous closing prices, as well as the interest in the coin (auctioned 59 times in the past), we could estimate a maximum purchase price around 40-50 euros.

It is important to note that the final closing price may vary depending on the demand at the auction and other factors that may influence buyers' decisions.