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

1. Coin Condition: The coin has a condition rating of 80 (MBC+). This is an important factor, as coins in better condition tend to fetch higher prices at auctions.

2. Starting Price and Previous Prices: The current starting price is 80 euros, and the average hammer price in previous auctions is 206.25 euros. This suggests that, in general, coins of this reference tend to sell for a significantly higher price than their starting price.

3. Auction History: In the auction history, there are examples of coins with similar conditions that have sold for prices that varied considerably. For instance, in previous auctions, coins with a condition of 85 have sold for prices around 210 euros, and some even higher.

4. Recent Trends: Looking at the most recent auctions, there is a pattern that coins with similar conditions have reached hammer prices that exceed the starting price. This suggests that there is active demand for this type of coin.

Based on these factors, an estimated maximum purchase price could be in the range of 200 to 250 euros. This is based on the average hammer price and the price history of coins with similar conditions.

Therefore, a reasonable estimated maximum purchase price for this coin could be approximately 220 euros.

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 80 (MBC+), indicating that it is in quite good shape. This generally translates to a higher value compared to coins with lower conditions.

2. Auction History:
- In 2015, the coin was auctioned with a starting price of 300 euros and sold for 1500 euros, indicating significant interest and high value at that time.
- In 2021, the same coin was auctioned with an estimated price of 15 euros, but it only sold for 10 euros, suggesting that interest in that particular coin had decreased significantly.

3. Average Hammer Price: The average hammer price for this coin is 543.33 euros, providing a good reference for its current value.

4. Current Starting Price: The starting price is 50 euros, which is relatively low compared to the average hammer price.

Given that the coin's condition is good and considering the auction history, an estimated maximum purchase price could be positioned in a range between the average hammer price and the highest recorded hammer price.

Taking all these factors into account, an estimated maximum purchase price could be approximately 800 to 1000 euros. This is based on the good condition and the interest it has shown in previous auctions, although market fluctuations and current collector interest should also be considered.

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 quite 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 110.85 euros.
- In previous auctions, hammer prices have varied, but there are examples of sales reaching up to 240 euros (in 2016) and 700 euros (in 2015) for coins of similar or better condition.
- Most hammer prices for coins with a condition rating of 70 to 80 have been in the range of 60 to 130 euros.

3. Starting Price and Average Starting Price: The current starting price is 50 euros, and the average starting price in the past has been 74.28 euros. This suggests that the market is willing to pay more than the starting price.

4. Recent Trends: In the most recent auctions, hammer prices have been in the range of 50 to 120 euros for coins with similar conditions.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 120 to 150 euros, considering that the condition is good and that the auction price history supports this estimate. However, it is important to keep in mind that the final price may vary depending on the competition in the auction and the interest of collectors.

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

2. Auction History:
- The average hammer price for similar coins has been 197.22 euros.
- In previous auctions, we have seen hammer prices that varied, but some relevant examples are:
- In 2022, a coin with a condition of 80 sold for 650 euros.
- In 2024, a coin with a condition of 85 sold for 240 euros.
- In 2022, a coin with a condition of 70 sold for 70 euros.

3. Starting Price and Average Starting Price:
- The current starting price is 30 euros, and the average starting price has been 146.94 euros.

4. Price Trends:
- Given that the coin has a history of hammer prices that can be significantly higher than the starting price, it is reasonable to assume that the hammer price could be considerably greater.

Based on these factors, an estimated maximum purchase price could be in the range of 200 to 300 euros, considering that the condition is good and that the price history shows that similar coins have reached higher prices in previous auctions.

Therefore, a reasonable maximum purchase price could be 250 euros.

To estimate a maximum purchase price for the coin in question, let's consider several factors:

1. Condition: The coin has a condition rating of 80 (MS+), 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 3 times in the past and has sold on all occasions. This is a good indicator of demand and can positively influence the price.

3. Previous Prices:
- In 2017, the coin was auctioned with a starting price of 18 euros and sold for 40 euros, with a condition of 70.
- In 2024, it was auctioned with a starting price of 20 euros and sold for 35 euros, also with a condition of 70.

4. Average Hammer Price: The average hammer price for this coin is 40 euros, suggesting that buyers are willing to pay close to this price in previous auctions.

5. Current Starting Price: The current starting price is 30 euros, which is reasonable given the price history and the condition of the coin.

Given that the condition of the current coin is better than the previous ones (80 versus 70), it is reasonable to assume that the hammer price could be higher than the average of 40 euros.

Taking all these factors into account, an estimated maximum purchase price could be between 45 and 50 euros, considering that the condition is better and there is a history of successful sales.