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

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. Current Listing Price and Previous Prices: The current listing price is 350 euros, which is significantly lower than the average listing price of 670.02 euros and the average auction price of 908.56 euros. This suggests that the listing price may be underestimated.

3. Auction History: In the past, the coin has had auction prices that varied considerably. For example, the highest recorded auction price is 450 euros (in 2013), but there is also an auction price of 2805 euros from a 2015 auction, although the latter seems to be an exceptional case.

4. Sales Trends: Out of the 7 times it has been auctioned, it has sold 5 times, indicating a consistent interest in the coin. This may influence demand and, therefore, the price.

5. Comparison with Average Prices: Given that the average auction price is 908.56 euros, and considering the current condition of the coin, an auction price that approaches this average could be reasonable.

Taking all these factors into account, an estimated maximum purchase price could be between 700 and 900 euros, considering that the condition is good and that interest in the coin appears to be solid. A price of 800 euros could be a reasonable target, as it falls in the middle of this range and aligns with the average auction price.

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

1. Current Condition: The coin has a condition rating of 95 (EF+), indicating that it is in very 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 214.14 euros.
- In the past, hammer prices have varied significantly, ranging from 40 euros to over 1900 euros, depending on the condition and demand at the time of the auction.

3. Recent Auction Prices:
- In recent auctions, hammer prices have been in the range of 70 to 245 euros for coins with similar conditions (for example, 95 and 80).

4. Starting Price: The starting price is 175 euros, which may influence the final price, as hammer prices are often higher than the starting price.

Taking these factors into account, an estimated maximum purchase price for this coin could be in the range of 250 to 300 euros, given its condition and the history of hammer prices. This is based on the trend that coins in similar conditions have reached hammer prices in that range in the past.

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

1. Current Condition: The coin has a condition 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 coin has been auctioned 9 times, of which it has sold 6 times. This suggests that there is consistent interest in the coin.
- The average starting price in previous auctions is 68.48 euros, and the average hammer price is 66.16 euros. This provides context regarding the market value of the coin.

3. Previous Prices:
- Previous hammer prices varied, but there is a notable price of 93.81 euros in 2013 for a coin with the same condition (85).
- There is also a hammer price of 80 euros in 2015 for a coin with a condition of 90, indicating that the price may be sensitive to condition.

4. Current Starting Price: The starting price is 80 euros, which is a good starting point.

Given that the condition of the coin is good (85) and considering the previous hammer prices, an estimated maximum purchase price could be in the range of 90 to 100 euros. This is based on historical interest and the current condition.

Therefore, an estimated maximum purchase price could be 95 euros.