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

1. Starting Price: 1300 euros.
2. Condition: The coin has a condition rating of 80 (MBC+), indicating that it is in fairly good shape.
3. Auction History:
- The average hammer price in previous auctions is 1217.27 euros.
- The coin has been auctioned 12 times, of which it has sold 11 times, indicating good demand.
- In previous auctions, the hammer price has varied, reaching up to 2032 euros in a recent auction.

4. Price Trends:
- In previous auctions, the hammer price has ranged from 740 euros to 2032 euros, depending on the condition and demand at that time.

Given that the coin is in good condition and has shown a history of relatively high hammer prices, an estimated maximum purchase price could be set above the starting price, but it should also be reasonable compared to the price history.

Estimated Maximum Purchase Price: Considering all these factors, a reasonable maximum purchase price could be around 1600-1800 euros. This is based on the hammer price history and the good condition of the coin.