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 of 75 (MBC), indicating that it is in fairly good shape.

2. Starting Price and Average Hammer Price: The starting price is 60 euros, and the average hammer price in previous auctions is 73.25 euros. This suggests that, on average, similar coins have reached prices above the starting price.

3. Sales History: The coin has been auctioned 119 times, of which it has sold 105 times. This indicates a high sales rate, which can be a good indicator of demand.

4. Previous Prices: Looking at previous hammer prices for coins with a similar condition (75), the highest recorded price was 130 euros in a previous auction. However, there are also lower prices, suggesting that the market can be variable.

5. Recent Trends: In the most recent auctions, hammer prices for coins with similar conditions have ranged from 90 to 130 euros.

Based on these factors, an estimated maximum purchase price could be set in a range between 90 and 130 euros, considering that the condition is good and there is a history of hammer prices that supports this estimate.

Therefore, a reasonable estimated maximum purchase price could be 120 euros.