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

1. Current Condition: The coin has a condition rating of 75 (MBC), indicating that it is in an acceptable state, but not among the best qualities.

2. Starting Price: The starting price is 80 euros, which sets a baseline for the auction.

3. Sales History:
- The average hammer price in previous auctions is 212.24 euros.
- It has been auctioned 56 times, of which 32 have been successful sales. This indicates considerable interest in the coin.
- Previous hammer prices for coins with a similar condition (75) have varied, but there are examples of auctions exceeding 200 euros.

4. Price Trends:
- In previous auctions, coins with a condition of 75 have reached hammer prices of up to 240 euros.
- The average starting price in previous auctions is 177.15 euros, suggesting that the current starting price of 80 euros is relatively low compared to the historical average.

5. Market Expectations: Since there are no auctions scheduled in the coming days, this could increase competition among interested bidders.

Based on these factors, an estimated maximum purchase price could be between 200 and 250 euros, considering that interest in the coin is high and that the price history suggests it could reach figures above 200 euros under similar conditions.

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