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 (EF+), indicating that it is in very good shape. This generally translates to a higher price compared to coins in lower conditions.

2. Auction History:
- The average hammer price for similar coins in the past is 73.68 euros.
- The highest hammer prices in previous auctions for coins of similar condition (around 80-95) have reached up to 230 euros (in 2021) and 160 euros (in 2022).

3. Starting Price: The current starting price is 175 euros, suggesting that the seller has high expectations based on sales history.

4. Market Trends: Given that the coin has been auctioned 49 times and has had a good sales percentage (41 out of 49), this indicates a consistent interest in the coin.

Based on these factors, an estimated maximum purchase price could be in the range of 200 to 250 euros, considering that the condition is high and there are precedents of hammer prices exceeding 200 euros. However, the starting price of 175 euros also suggests that the seller is looking for a reasonable price in the current market.

Therefore, a reasonable maximum purchase price could be approximately 220 euros.