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

1. Current 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 in lower conditions.

2. Previous Prices: By looking at previous auction prices for coins with a similar condition (95), we find that:
- In 2020, it sold for 265 euros.
- In 2019, it sold for 240 euros.
- In 2014, it sold for 190 euros.

3. Average Auction Price: The average auction price for this coin is 130.02 euros, but this may be influenced by coins in worse conditions.

4. Starting Price: The current starting price is 125 euros, which is a good starting point.

5. Market Trends: Since the coin has been auctioned 71 times and has a 74.64% sell-through rate (53 out of 71), this suggests there is consistent interest in this coin.

Based on these factors, an estimated maximum purchase price could be between 200 and 250 euros, considering that the condition is high and there are precedents of previous auctions in that range. However, given the starting price of 125 euros, it is likely that the final auction price will not exceed 250 euros in this auction.

Therefore, a reasonable maximum purchase price could be 250 euros.