Based on the data provided, we can observe that the coin in question had an initial price of 25 euros in this auction, with a conservation grade of 70 (MBC-). Additionally, it has been auctioned 13 times in the past, with an average starting price of 52.54 euros and an average closing price of 120.75 euros.

When analyzing the previous prices of this coin, we can see that it has had variations in its starting, estimated, and closing prices throughout the previous auctions. The conservation grade of the coin has also varied, ranging from 30 to 90.

Considering this data, as well as the trend of previous prices, and taking into account that the current conservation grade is 70 (MBC-), my estimate for a maximum purchase price would be around 100-110 euros. It is important to note that this is just an estimate and the final price may vary depending on factors such as demand at the auction and competition from other bidders.