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 85 (ebc-), 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 is 71.38 euros.
- In previous auctions, we have seen hammer prices that varied significantly, ranging from 6 euros to 700 euros, depending on the condition and other factors.
- The last auction with a notable hammer price was 132 euros for a coin with a condition of 95.

3. Starting Price and Average Starting Price:
- The current starting price is 60 euros, which is slightly higher than the average starting price of 39.88 euros. This may indicate an expectation of greater interest in this auction.

4. Price Trends:
- In recent auctions, hammer prices have shown an increase, especially for coins in good condition.

Based on these factors, an estimated maximum purchase price could be in the range of 90 to 120 euros. This is based on the historical hammer prices for coins of similar condition and the current interest in the auction.

Therefore, a reasonable maximum purchase price could be 100 euros.