Based on the provided data, we can see that the coin in question has a conservation grade of 70 (MBC-), with a starting price in the current auction of 30 euros. Additionally, it has been auctioned twice in the past, both times it was sold, and the average selling price was 60 euros.

Regarding the previous prices of this coin, in the last auction the starting price was 75 euros and the estimated price was 125 euros. However, there is no information available on the final selling price on that occasion.

Taking into consideration these data, and considering that the coin is in an acceptable conservation state and has performed well in previous auctions, we could estimate a maximum purchase price around 120-130 euros. This is based on the estimated price in the last auction and the fact that the coin has been sold in all previous occasions.