Based on the provided data, 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 in previous auctions was 23.13 euros, while the average final price was 57.5 euros. The coin has been auctioned 9 times in the past, sold in 8 instances and not sold once.

Given that the coin will be auctioned again in the coming days, and considering the previous prices and current condition, as well as the fact that the coin has sold in most previous auctions, we could estimate a maximum purchase price around 50-60 euros.

It is important to note that the final auction price will depend on various factors, such as demand at that specific moment, competition from other bidders, and buyers' perception of the coin's value on that particular occasion.