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 coin has been auctioned 6 times in the past, of which it has sold 5 times. This suggests that there is consistent interest in the coin.
- The average starting price in previous auctions has been 1900 euros, and the average hammer price has been 2240 euros. This indicates that, on average, coins of this reference tend to sell for a price close to 2240 euros.

3. Previous Prices:
- In past auctions, the hammer prices have varied, but the highest was 3400 euros in 2014, indicating potential for reaching higher prices depending on demand.
- The last auction in 2022 had a hammer price of 1600 euros, which could indicate a downward trend in interest or value, but this may be an isolated case.

4. Current Starting Price: The current starting price is 3000 euros, which is significantly higher than the average starting price of previous auctions. This may be an indicator that the seller expects high interest in this auction.

5. Maximum Price Estimate: Given that the condition is good and considering the price history, a maximum purchase price could be situated between the average hammer price (2240 euros) and the highest recorded price (3400 euros). However, since the starting price is 3000 euros, it is reasonable to estimate that the maximum purchase price could be around 3000-3500 euros, depending on the competition in the auction.

Maximum Purchase Price Estimate: 3500 euros.