Based on the provided data, we can observe that the coin in question had a starting price of 30 euros in the most recent auction, with a grade of 80 (MBC+). Additionally, it has been auctioned a total of 31 times in the past, being sold in 23 instances and not sold in 8 instances.

The average starting price of previous auctions has been 23.55 euros, while the average final price has been 31.64 euros. Regarding the past prices of this coin, we can see that it has had variations in its starting, estimated, and final values throughout past auctions.

Given that the coin's grade is 80 (MBC+) and considering its good performance in previous auctions, we could estimate a maximum purchase price around 60-70 euros. It is important to note that the final price will depend on the demand in the upcoming auction and the willingness of buyers to bid on it.