Based on the data provided, we can observe that the coin in question has had a starting price in the current auction of 40 euros and is in a conservation grade of 80 (MBC+). Additionally, it has been auctioned a total of 37 times in the past, being sold in 29 occasions and not sold in 8 occasions.

The average starting price of previous auctions has been 20.24 euros, while the average final price has been 41.52 euros. Regarding the previous prices of this coin, we can see that it has had significant variations in its starting, estimated, and final values throughout past auctions.

Considering the previous prices of this coin and its auction history, as well as its current conservation grade, we could estimate a maximum purchase price around 70-80 euros. It is important to note that this is just an estimate and the final price may vary depending on the demand in the current auction.