Based on the provided data, the coin in question has a conservation grade of 70 (MBC-), with a starting price at the last auction of 25 euros, an estimated price of 40 euros, and a final price of 36 euros. Considering that the average starting price is 32.5 euros and the average final price is 36 euros, and taking into account that the coin will be auctioned in the upcoming days, we can estimate a maximum purchase price around 40 euros. It is important to consider that factors such as demand at the auction and the exact conservation of the coin can influence the final purchase price.