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 quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Auction History:
- The average hammer price for this coin in the past is 83.06 euros.
- The last auction for this coin had a starting price of 60 euros, suggesting that the market is willing to pay at least that amount.
- In previous auctions, hammer prices have varied, but there are examples of sales reaching up to 290 euros under similar conditions.

3. Recent Trends:
- In the most recent auctions, hammer prices have ranged from 100 to 150 euros for coins of similar condition (80 and 85).
- The coin has been auctioned 37 times, of which 33 resulted in sales, indicating good demand.

4. Starting Price and Estimated Price:
- The starting price is 60 euros, and the average starting price in the past is 54.08 euros. This suggests that the current starting price is reasonable and could attract bidders.

Based on these factors, an estimated maximum purchase price could be in the range of 100 to 130 euros, considering that the condition is good and there is a history of hammer prices supporting this estimate. However, given the interest in the coin and its condition, a maximum purchase price of 130 euros seems reasonable.