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 for this coin in the past has been 104.4 euros.
- Previous auctions show that coins with a similar condition (75) have reached hammer prices that vary, but some examples are:
- 85 euros (2018-12-11)
- 92 euros (2017-10-18)
- 75 euros (2020-10-27)
- 110 euros (2018-12-12)
- The current starting price is 60 euros, which is below the average hammer price.

3. Recent Trends: The coin has been auctioned 93 times, of which 87 have been successful sales. This indicates good demand and consistent interest in the coin.

4. Recent Starting and Hammer Prices: The average starting price is 62.4 euros, suggesting that the current starting price of 60 euros is competitive.

Based on these factors, an estimated maximum purchase price could be in the range of 100 to 120 euros, considering that the average hammer price has been 104.4 euros and that the coin's condition is good.

Therefore, a reasonable maximum purchase price could be 120 euros.