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 an acceptable state, but not in the best condition.

2. Starting Price: The starting price is 60 euros, which is a good starting point.

3. Auction History:
- The average hammer price in previous auctions is 213.93 euros, suggesting that, in general, coins of this reference tend to sell for much higher prices than their starting price.
- The coin has been auctioned 30 times, of which it has sold 17 times. This indicates a sell-through rate of 56.67%, which is quite positive.

4. Previous Prices:
- In previous auctions, we have seen hammer prices that varied significantly, with some reaching up to 1300 euros in similar conditions.
- However, the most recent hammer prices for coins with similar condition (75) have been in the range of 65 to 200 euros.

5. Recent Trends: In the most recent auctions, hammer prices have been around 85 euros, which may indicate the current market trend.

Based on these factors, an estimated maximum purchase price could be in the range of 150 to 200 euros, considering that the average hammer price is significantly higher than the starting price and that the condition of the coin is acceptable.

Therefore, a reasonable estimated maximum purchase price could be 180 euros.