To estimate a maximum purchase price for the coin in question, we will consider several factors:

1. Condition: The coin has a condition rating of 95 (S/C-), indicating that it is in very good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Starting Price: The starting price is 1500 euros, which is significantly higher than the average starting price of 238.77 euros. This suggests that the seller has high expectations for this coin.

3. Auction History: By looking at previous hammer prices for coins with a similar condition (95 or 100), we can see that hammer prices have varied, but generally, coins in good condition tend to reach higher prices. For example, in previous auctions, coins with a condition of 95 have reached hammer prices of up to 400 euros.

4. Recent Trends: In the most recent auctions, hammer prices for coins with a condition of 95 have been in the range of 300 to 400 euros. This suggests that, although the starting price is high, the actual hammer price may be more aligned with these values.

5. Market Expectations: Given that there are 3 auctions scheduled in the coming days, this could increase competition and potentially the hammer price.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 350 to 400 euros, considering that the starting price is significantly higher and that the market may be willing to pay a bit more due to the good condition of the coin. However, it is important to keep in mind that the final price will depend on the competition in the auction and the interest of other buyers.