Based on the data provided, we can observe that the coin in question has had a starting price of 30 euros in this auction, with a conservation grade of 70 (MBC-). Additionally, it has been auctioned five times in the past, always selling, with average starting and closing prices of 78 and 135 euros respectively.

When analyzing the previous prices of this coin, we see that it has had significant variations in its auction values. For example, in the 2016 auction it had a starting price of 150 euros and a closing price of 185 euros, while in the 2022 auction it had a starting price of 60 euros and a closing price of 240 euros.

Given that the conservation grade of the coin is 70 (MBC-), and considering the previous prices from past auctions, as well as the current starting price and average starting and closing prices, we could estimate a maximum purchase price around 200-220 euros for this coin in the current auction. It is important to note that the final value may vary depending on demand and other factors in the auction.