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 conservation grade of 30 (BC+). Additionally, it has been auctioned 16 times in the past, sold in 14 instances and not sold in 2 instances.

The average starting price of previous auctions has been 93.33 euros, while the average final selling price has been 144.23 euros. Previous prices for this coin have ranged between 75 euros and 125 euros in past auctions, with price estimates reaching up to 225 euros.

Taking into consideration these data, as well as the price evolution in previous auctions, and considering the conservation grade of the coin is 30 (BC+), we could estimate a maximum purchase price around 160-180 euros for this coin in the next auction. It is important to note that factors such as demand at the time of the auction and competition from other bidders can influence the final selling price.