Based on the data provided, we can observe that the coin in question has had a starting price in the current auction of 60 euros and is in a conservation grade of 70 (MBC-). Additionally, it has been auctioned in the past on several occasions, with varying starting and estimated prices.

The average selling price of this coin in previous auctions has been 231.04 euros, with an average starting price of 111.11 euros. We can also see that it has had selling prices that have significantly exceeded the estimated prices on some occasions.

Given that the coin is in a conservation grade of 70 (MBC-) and considering the previous selling prices, as well as the interest it has generated in past auctions, we could estimate a maximum purchase price of around 250-300 euros for this coin in the current auction. It is important to note that the final price will depend on the demand in the auction and the competition from other potential buyers.