Based on the data provided, we can observe that the coin in question has had varying starting and final prices in previous auctions. The current condition of the coin is estimated at 70 (VF+), indicating that it is not in the best condition, but also not in the worst.

The average starting price in previous auctions has been 53 euros, while the average final price has been 72.75 euros. Additionally, it has been auctioned 10 times in the past, being sold in 8 of those occasions.

Taking into account the previous prices of the coin, its current condition, and the fact that it has sold in the majority of previous auctions, we could estimate a maximum purchase price around 80-90 euros. Since the final price has been on average higher than the starting price, and considering the condition and demand for the coin, a price in that range could be a reasonable estimate for a potential purchase.