Given that the coin has a conservation rating of 85 (MBC+/EBC-), indicating good quality, and considering that this is the first time it is being auctioned, the starting price is set at 25,000 euros.

In previous auctions, the hammer price has not been recorded, suggesting that there is no historical data that could influence the estimation. However, since the starting price is the same as the average starting price, this may indicate that the seller is confident in the value of the coin.

Since there are no previous sales and the conservation is good, an estimated maximum purchase price could be slightly higher than the starting price, but not by much, as there are no precedents to justify a significant increase.

Therefore, an estimated maximum purchase price could range between 25,000 and 30,000 euros, depending on the interest of collectors and the competition in the auction.