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

1. Current Condition: The coin has a condition rating of 75 (MBC), indicating that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Auction History:
- The average hammer price in previous auctions is 96.03 euros.
- The average starting price is 70.2 euros.
- In past auctions, we have seen hammer prices that varied significantly, ranging from 42 euros to 422.6 euros, depending on the condition and demand at that time.

3. Recent Trends:
- In the most recent auctions, the starting price has been 40 euros, with an estimated price of 60 euros. This suggests that interest in the coin remains, but there may be some downward pressure on the starting price.

4. Comparison with Previous Prices:
- In previous auctions with similar condition (75), hammer prices have ranged between 60 and 110 euros.

Taking all these factors into account, an estimated maximum purchase price could be around 100 euros. This price reflects a balance between the coin's condition, price history, and current market trend. However, it is important to stay alert to the auction dynamics and competition, as this can influence the final price.