Based on the data provided, we can observe that the coin in question has had an average starting price of 27.44 euros in previous auctions, with an average closing price of 39.64 euros. The coin's condition has been maintained at an average of 80 (VF+).

Considering the coin's previous prices in past auctions, as well as its condition, we can estimate a maximum purchase price for this coin in the upcoming auction. Given that the estimated price has ranged between 20 and 80 euros in previous auctions, and considering that the condition remains at an acceptable level, we could propose a maximum purchase price of around 70 euros.

It is important to note that the final auction price may vary depending on demand and other factors, so it is advisable to monitor its evolution to adjust the offer accordingly.