Based on the data provided, we can observe that the coin in question has had an average auction closing price of 145.76 euros in previous auctions. Additionally, its current condition is 85 (ebc-).

Considering that the condition is quite good and the average auction closing price has been 145.76 euros, we could estimate a maximum purchase price around 160-170 euros. Given that the starting price in the upcoming auction is 140 euros, an estimated maximum purchase price of 160-170 euros could be reasonable for this coin in these conditions.