Based on the information provided, we have a coin with a grade of 30 (BC+), with a starting price at auction of 60 euros. Since this coin has not been auctioned or sold in the past, we do not have historical pricing data.

Given that the coin's grade is relatively low (BC+) and considering its starting price of 60 euros, we could estimate a maximum purchase price around 40-50 euros. It is important to note that without historical sales data, this estimation is more speculative and could vary depending on demand at the auction.