Given that the coin has a conservation rating of 80 (MBC+), indicating good quality, and considering that this is the first time it is being auctioned, the starting price is set at 600 euros.

In previous auctions, the average hammer price is not available, suggesting that there are no historical data that could influence the estimation. However, since the starting price is 600 euros and the conservation is good, we could estimate that the hammer price might be in a range above the starting price.

Taking these factors into account, an estimated maximum purchase price could be between 800 and 1000 euros, depending on the interest of collectors and the competition in the auction.