Based on the data provided, we can observe that the coin in question had an initial price of 15 euros in this auction and is in a conservation grade of 70 (MBC-). Additionally, it has been auctioned six times in the past, with an average starting price of 84.6 euros and an average closing price of 106.67 euros.

When analyzing the previous prices of this coin, we can see that in the last auction held on March 17, 2022, the coin was sold for 110 euros with a conservation grade of 95. In previous auctions, prices have ranged from 18 euros to 175 euros, with estimates varying between 15 euros and 300 euros.

Given that the coin is in a conservation grade of 70 (MBC-), and considering the previous prices and the upward trend in closing prices, we could estimate a maximum purchase price for this coin around 130-140 euros. It is important to note that this is just an estimate and the final price will depend on various factors such as demand at the auction and the interest of potential buyers.