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

1. Current Condition: The coin has a condition rating of 80 (MBC+), indicating that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous Auction Prices:
- The average hammer price in previous auctions is 1171.4 euros.
- In the most recent auctions, the hammer price has been around 1200 euros, with a starting price of 1100 euros in the latest auction.

3. Price Trends:
- In 2022, the coin was auctioned with a starting price of 1100 euros and sold for 1200 euros, suggesting that the market is willing to pay a bit more than the starting price.
- In 2024, it was auctioned with a starting price of 1500 euros and sold for 2200 euros, indicating a significant increase in interest and value for the coin.

4. Current Starting Price: The starting price is 1100 euros, which sets a baseline for the purchase price.

Taking all these factors into account, an estimated maximum purchase price could be around 1300-1400 euros. This is based on the recent hammer price and the trend of increasing value for the coin, as well as its good condition.