Based on the data provided, we can observe that the coin has performed well in previous auctions, with final prices exceeding the starting and estimated prices by a significant margin. Additionally, the coin's condition is around 70 (VF+), indicating that it is not in poor condition.

The average auction price for this coin has been 68.57 euros, with an average starting price of 27 euros. Considering that the maximum estimated purchase price is usually higher than the average auction price, and taking into account the coin's strong performance in previous auctions, we could estimate a maximum purchase price around 80-90 euros.

It is important to note that the final auction price may vary depending on factors such as demand at the time of the auction and competition from other bidders interested in the coin.