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 30 (BC+), indicating that it is not in the best condition, but also not in the worst.

The average starting price of the coin in previous auctions has been 65.13 euros, while the average final price has been 79.38 euros. Additionally, it has been auctioned a total of 8 times in the past, with a 100% success rate in sales.

Taking into account the previous prices of the coin, its current condition, and the fact that it has sold in all previous auctions, we could estimate a maximum purchase price around 100-120 euros. It is important to note that this is just an estimate and the final price in an auction can vary depending on demand and other factors.