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 70 (MS-). This is an important factor, as coins in better condition tend to reach higher prices.

2. Previous Auction Prices: By observing the hammer prices of coins with a similar condition (70), we can see that they have reached hammer prices of up to 150 euros in recent auctions. For example, at the auction on 2023-03-16, a coin with a condition of 70 was sold for 150 euros.

3. Average Hammer Price: The average hammer price for this coin is 135.85 euros, which also gives us a reference for the expected value.

4. Current Starting Price: The starting price is 110 euros, indicating that the seller expects a minimum price of 110 euros.

5. Auction Trends: The coin has been auctioned 44 times, of which 40 have been sold. This suggests that there is a consistent interest in this coin, which may influence its price.

Based on these factors, an estimated maximum purchase price could be around 150 euros, as this is a price that has been reached in previous auctions for coins of similar condition. However, it is important to consider that the final price may vary depending on the competition in the auction and the interest of other buyers.