To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially the auction history and previous hammer prices.

1. Current Condition: The coin has a condition of 75 (MBC). This is an important factor, as coins in better condition tend to reach higher prices.

2. Price History:
- The average hammer price for this coin is 142.2 euros.
- In the past, we have seen hammer prices that varied significantly depending on the condition. For example, in previous auctions, coins with similar conditions (75) have reached hammer prices of up to 130 euros.
- There are also examples of coins with higher conditions (85-95) that have reached hammer prices of 210-360 euros.

3. Starting Price: The current starting price is 60 euros, which is relatively low compared to the average hammer price.

4. Sales Trends: The coin has been auctioned 174 times, with a high percentage of sales (167 times). This indicates a constant interest in this coin.

5. Estimation: Given that the condition is 75 and considering the average hammer price and previous hammer prices, a reasonable maximum purchase price could be in the range of 130 to 150 euros. This is based on the fact that the average hammer price is 142.2 euros and that coins in similar conditions have reached hammer prices of up to 130 euros.

Therefore, an estimated maximum purchase price for this coin could be approximately 150 euros.