Based on the provided data, we know that the coin in question has a grade of 80 (MBC+), has been auctioned twice in the past, selling once and not selling the other time. The starting price this time is 60 euros, with a historical average starting price of 71.67 euros and a historical average selling price of 1500 euros.
Additionally, we have information on previous auctions of this same coin:
1. In the auction on November 7, 2018, the coin had a starting price of 125 euros, sold for 1500 euros, and had a grade of 95.
2. In the auction on November 3, 2020, the coin had a starting price of 30 euros, an estimated price of 45 euros, but there is no information provided on the selling price or grade.
Given that the coin is graded at 80 (MBC+), and considering that in the previous auction with a grade of 95 it sold for 1500 euros, we could estimate that this time, with a slightly lower grade, the selling price could be slightly lower.
Taking all these data into account, and assuming the coin will sell this time, we could estimate a maximum selling price of around 1200-1400 euros. However, keep in mind that the final price will depend on the demand at the auction and other factors that may influence buyers' decisions.