Based on the provided data, we can observe that the coin in question has had an average auction closing price of 144.59 euros in previous auctions. Additionally, the condition of the coin on this occasion is estimated to be 80 (VF+).

Given that the coin's condition is quite good and considering the historical prices of previous auction closings, as well as the current starting price of 150 euros, we could estimate a maximum purchase price around 160-170 euros.

It is important to note that the final auction price may vary depending on the demand at that specific moment, so it is advisable to keep an eye on the auction's progress to adjust the offer accordingly.