Based on the data provided, we can observe that the coin in question has had a progressive increase in its final price throughout the previous auctions. Additionally, its current condition is at a level of 80 (MBC+), which is quite good.

The average final price in the previous auctions has been 30 euros, with an average starting price of 25.4 euros. However, in the last auction, the coin was sold above this average price, indicating a growing interest in it.

Taking these data into consideration, as well as the fact that it will be auctioned again in the upcoming days, we could estimate a maximum purchase price around 35-40 euros. Since the starting price is 40 euros, it is possible that the coin will reach a final price close to this value or even higher, given the upward trend in final prices observed in the previous auctions.