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

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

2. Auction History:
- The average hammer price for similar coins in the past is 160.25 euros.
- It has been auctioned 38 times, of which 29 have been sold, indicating good demand.
- Previous hammer prices for coins with similar conditions (70-85) have varied, but there are examples of auctions reaching up to 1500 euros for coins in better condition.

3. Starting and Hammer Prices:
- The current starting price is 10 euros, which is quite low compared to the average hammer price.
- In previous auctions, starting prices have varied, but the average starting price is 78.66 euros.

4. Recent Trends:
- In the most recent auctions, hammer prices have ranged from 50 to 150 euros for similar conditions.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 150 to 250 euros, considering that the condition is good and there is a history of hammer prices that supports this estimate. However, given that the coin has a condition of 75, it is wise not to exceed 250 euros in the bidding.