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

1. Current Condition: The coin has a condition of 80 (MS+), which indicates 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 in previous auctions is 69.02 euros.
- The last auction for this coin had a hammer price of 65 euros with a condition of 80.
- In previous auctions, hammer prices have varied, but there are examples of hammer prices exceeding 200 euros for coins of similar or better condition.

3. Starting Price and Average Starting Price:
- The current starting price is 20 euros, which is relatively low compared to the average starting price of 35.64 euros.

4. Sales Trends: The coin has been auctioned 15 times, of which 9 have been sold. This indicates a consistent interest in the coin, which may influence its price.

Based on these factors, an estimated maximum purchase price could be in the range of 80 to 100 euros, considering that the condition is good and that the auction price history suggests it could reach higher figures in auctions. However, since the starting price is low, it could be a good opportunity to acquire it at a reasonable price.

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 75 (MBC), indicating that it is in fairly good shape, but not the best possible condition.

2. Auction History:
- The average hammer price in previous auctions is 33.47 euros.
- Starting prices have varied, with some hammer prices in similar conditions (75 and 80) reaching up to 59.78 euros in the past.

3. Price Trends:
- In previous auctions, starting prices have ranged from 12.12 euros to 78.93 euros, but the most relevant hammer prices for similar conditions have been in the range of 20 to 59.78 euros.

4. Current Starting Price: The starting price is 15 euros, suggesting that there is room for the hammer price to be significantly higher.

5. Sale Expectations: Given that there have been 19 previous auctions and 9 sales, there is moderate interest in this coin, which may influence competition during the auction.

Based on these factors, an estimated maximum purchase price could be in the range of 50 to 60 euros, considering that the condition is good and there is a history of hammer prices in that range for similar conditions. However, given the starting price of 15 euros, it is possible that the actual hammer price may be lower, but this range provides a reasonable target for an interested buyer.

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

1. Condition: The coin has a condition rating of 85 (ebc-), which indicates 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 in previous auctions is 79.13 euros, suggesting that, in general, coins of this reference tend to sell for significantly higher prices than the starting price.
- In past auctions, we have seen hammer prices vary, with some reaching up to 300 euros in 2011, although this may be an exceptional case.

3. Starting Price and Estimated Prices:
- The current starting price is 25 euros, which is relatively low compared to the average hammer price.
- The estimated price in previous auctions has varied, but there are examples where prices have been estimated at 40 to 50 euros.

4. Recent Trends:
- In the most recent auctions, the hammer price has been 40 and 120 euros for coins with the same condition, indicating a growing interest or an upward trend in the value of these coins.

Based on these factors, an estimated maximum purchase price could be in the range of 80 to 120 euros, considering the average hammer price and the condition of the coin. However, given the history of hammer prices, a reasonable maximum purchase price could be approximately 100 euros. This allows for competition in the auction and reflects the value of the coin's condition.