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 an acceptable state, but not among the best qualities.

2. Starting Price: The starting price is 2000 euros, which is a good starting point.

3. Auction History:
- The average hammer price for similar coins in the past has been 2833.74 euros.
- It has been auctioned 62 times, of which 45 have been sold, indicating good interest in the coin.
- In previous auctions, hammer prices have varied significantly, with some reaching very high figures (for example, 18263.26 euros in 2011 for a coin with a condition of 90).

4. Price Trends:
- The average hammer price for coins of similar condition (75) has been lower than the overall average, but still, there have been auctions where prices exceeded 2000 euros.

5. Comparison with Previous Prices:
- In previous auctions, coins with a condition of 75 have had hammer prices ranging between 1300 and 3700 euros, depending on demand and other factors.

Based on this data, an estimated maximum purchase price for this coin could be in the range of 3000 to 3500 euros, considering that interest in the coin is high and the average hammer price is 2833.74 euros. This allows for some competition in the auction, while also remaining within a reasonable range given the price history.