Based on the provided data, we can see that the coin is in a conservation state of 70 (MBC-), with a starting price of 30 euros and an average auction sale price of 125 euros in previous auctions. Since it has been auctioned once in the past and was sold on that occasion, we can consider that there is interest in this coin.

Considering the conservation state and the previous average auction sale price, as well as the fact that it was sold in the previous auction, we could estimate a maximum purchase price around 110-120 euros. It is important to note that the final price will depend on factors such as demand at the time of the auction and the willingness of buyers to bid on this particular coin.