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

1. Coin Condition: The coin being auctioned 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. Previous Auction Prices: By looking at the auction prices of coins with a similar condition (95), we can see that they have reached auction prices that vary, but many are in the range of 40 to 90 euros. For example, in previous auctions, coins with a condition of 95 have reached auction prices of 80 euros and more.

3. Average Auction Price: The average auction price for this coin is 46.65 euros, which is also a good indicator of the expected value.

4. Recent Trends: In the most recent auctions, auction prices have shown a trend of increasing, especially for coins in similar conditions.

5. Starting Price and Average Starting Price: The starting price is 30 euros, and the average starting price is 34.32 euros. This suggests that the auction price could be significantly higher than the starting price.

Taking all these factors into account, an estimated maximum purchase price for the coin in question could be in the range of 70 to 90 euros. This is based on the coin's condition, previous auction prices, and market trends.