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 (MS+). This is an important factor, as coins in better condition tend to fetch higher prices.

2. Starting Price and Average Hammer Price: The starting price is 100 euros, and the average hammer price in previous auctions is 141.7 euros. This suggests that, in general, coins of this reference tend to sell for above their starting price.

3. Sales History: The coin has been auctioned 83 times, of which 80 have been successful sales. This indicates good demand and sustained interest in this coin.

4. Previous Prices: Looking at previous hammer prices for coins with a similar condition (80-85), we can see that they have reached hammer prices that vary, but some have exceeded 200 euros in similar conditions.

5. Recent Trends: In the most recent auctions, hammer prices have shown a trend of being higher, especially for coins in similar condition.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 160 to 200 euros. This is based on the hammer price history and the current condition of the coin. However, it is important to note that the final price may vary depending on the competition in the auction and the interest of other buyers.

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

2. Starting Price and Average Hammer Price: The starting price is 60 euros, and the average hammer price in previous auctions is 136.65 euros. This suggests that, on average, similar coins have reached significantly higher prices than their starting price.

3. Sales History: The coin has been auctioned 242 times, of which 221 have been successful sales. This indicates good demand and consistent interest in this reference.

4. Previous Prices: Looking at previous hammer prices for coins with a similar condition (80), we can see that they have reached hammer prices that vary, but some have gone for 150 euros or more in recent auctions.

5. Recent Trends: In the most recent auctions, hammer prices for coins of similar condition have shown an increase, which could indicate an upward trend in the value of these coins.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 150 to 180 euros. This range takes into account both the average hammer price and the condition of the coin, as well as recent market trends.

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 85 (MS+/EF-), indicating that it is in quite good shape. This generally translates to a higher price compared to coins in lower condition.

2. Auction History:
- The average hammer price in previous auctions is 56.38 euros.
- The coin has been auctioned 9 times, of which it has sold 8 times, indicating good demand.
- Previous hammer prices varied, but there are examples of hammer prices reaching up to 55 euros in similar conditions.

3. Starting Price and Average Starting Price:
- The current starting price is 50 euros, which is slightly lower than the average starting price of 53.67 euros. This may indicate that the seller is looking for a quick sale or that there is an expectation that the price will not rise much further.

4. Price Trends:
- In previous auctions, hammer prices have fluctuated, but there is a price pattern suggesting that coins in similar conditions have reached hammer prices ranging from 30 to 55 euros.

Based on these factors, an estimated maximum purchase price could be in the range of 60 to 70 euros. This is because, although the starting price is 50 euros, the good condition and price history suggest that there may be enough interest for the hammer price to exceed the previous average.

Therefore, a reasonable maximum purchase price could be 70 euros.