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

1. Coin Condition: The coin has a condition of 70 (MS-), indicating that it is in acceptable condition, but not of the highest quality.

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 that vary, but generally range between 50 and 100 euros. For example, in previous auctions, coins with a condition of 70 have had hammer prices of 59, 75, and 62 euros.

3. Average Hammer Price: The average hammer price for this coin is 72.87 euros, which is also a good indicator of the expected value.

4. Starting Price: The starting price is 40 euros, suggesting that the seller expects a reasonable price, but the hammer price could be significantly higher.

5. Market Trends: Since the coin has been auctioned 114 times and has had a high sales percentage (101 out of 114), this indicates a constant interest in this coin, which may increase its value.

Based on these factors, an estimated maximum purchase price for this coin could be between 80 and 100 euros. This is based on the analysis of previous hammer prices and the current condition of the coin. A price of 90 euros could be a reasonable target for a maximum bid.