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

1. Current Condition: The coin has a condition rating of 75 (MBC), indicating that it is in relatively good shape, but not among the highest quality.

2. Starting Price and Average Hammer Price: The current starting price is 60 euros, and the average hammer price in previous auctions is 249.3 euros. This suggests that, in general, coins of this reference tend to sell for significantly higher prices than their starting price.

3. Sales History: The coin has been auctioned 40 times, of which it has sold 33 times. This indicates good demand and a history of successful sales.

4. Previous Prices: By looking at previous hammer prices for coins with similar conditions, we can see significant variations. For example, a coin with a condition of 70 sold for 85 euros, while one with a condition of 95 reached 400 euros.

5. Recent Trends: In the most recent auctions, hammer prices have been quite high, suggesting that interest in this coin may be increasing.

Based on these factors, an estimated maximum purchase price could be in the range of 200 to 300 euros, considering that the condition of 75 is a limiting factor, but the sales history and average hammer price are quite high.

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