To estimate a maximum purchase price for the coin in question, let's 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 increases its value compared to coins with lower conditions.

2. Starting Price: The starting price is 600 euros, which is a good indicator of the value the seller expects to obtain.

3. Auction History:
- The average hammer price in previous auctions is 574.56 euros, suggesting that, on average, coins of this reference have sold for a price close to this value.
- In previous auctions, hammer prices for coins with similar condition (95) have varied, but many have reached or exceeded 600 euros, as seen in the auctions of 2021 and 2022.

4. Recent Trends: In the most recent auctions, hammer prices have been in the range of 600 to 900 euros, indicating an upward trend in the value of this coin.

Based on these factors, an estimated maximum purchase price could be between 700 and 800 euros, considering that the condition is high and that the price history suggests buyers are willing to pay more for coins in similar conditions.

Therefore, a reasonable maximum purchase price could be 800 euros.