Based on the data provided, we can observe that the coin in question has had a starting price of 30 euros in this auction and is in a conservation grade of 70 (MBC-). Additionally, it has been auctioned 12 times in the past, always managing to sell.

The average starting price of this coin in previous auctions has been 145 euros, while the average final price has been 180 euros. Previous prices of this coin have varied, with estimates ranging from 75 euros to 600 euros.

Considering this data, as well as the current conservation grade of the coin and previous prices, we could estimate a maximum purchase price around 200 euros. It is important to note that this is just an estimate and the final price may vary depending on demand at the auction and other factors.