Based on the data provided, we can observe that the coin in question had a starting price of 25 euros in the most recent auction, with a conservation value of 30. In the past, it has had starting prices ranging from 12 to 60 euros, with estimated prices fluctuating between 20 and 100 euros.

Considering that the current conservation of the coin is 70 (VF+), and taking into account the previous prices of similar auctions, as well as the fact that it will be auctioned in the coming days, we could estimate a maximum purchase price around 60-70 euros. It is important to note that the final auction price may vary depending on the demand at the auction and other factors that may influence the decision of potential buyers.