Based on the provided data, we can observe that the coin in question has had a starting price in the current auction of 15 euros, with a conservation grade of 70 (MBC-). Additionally, it has been auctioned in the past 12 times, with an average starting price of 80.75 euros and an average closing price of 94.92 euros.

When analyzing the previous prices of this coin in past auctions, we can see that it has had a wide price range, from 1 euro to 150 euros in estimated price. The conservation of the coin has varied between 70 and 95.

Given that the current starting price is 15 euros and considering the previous prices of this coin, as well as its current conservation, we could estimate a maximum purchase price around 120-130 euros. This is based on the fact that the estimated price in previous auctions has reached up to 150 euros, and taking into account that the current conservation is 70 (MBC-), which can influence the final price.

It is important to note that the final auction price will depend on several factors, such as the demand at that specific moment, the competition from other bidders, and the buyers' perception of the coin's value in that conservation grade.