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 relatively good shape. This generally translates to a higher price compared to coins in lower conditions.

2. Auction History:
- The average hammer price in previous auctions is 95.25 euros, suggesting that, on average, coins of this reference sell for a price close to this value.
- The last auction with a known hammer price was 140 euros (in 2016), indicating that there is potential to reach higher prices depending on demand.

3. Starting Price and Previous Sales:
- The current starting price is 50 euros, which is relatively low compared to the average hammer price. This may attract more bidders and potentially raise the final price.
- There have been 12 previous auctions, of which 9 resulted in sales, indicating a consistent interest in this coin.

4. Price Trends:
- Observing previous hammer prices, there is a trend for coins in good condition (like the current one) to sell above the starting price.

Based on these factors, an estimated maximum purchase price could be in the range of 100 to 120 euros. This is based on the average hammer price and the price history of similar coins in comparable conditions.

Therefore, a reasonable maximum purchase price could be 110 euros.

Given that the coin has a grade of 80 (MBC+), indicating good quality, and considering that this is the first time it is being auctioned, the starting price is set at 100 euros.

In this case, since there are no historical sales data for this coin, a maximum purchase price can be estimated based on the grade and the starting price.

Generally, coins in good condition can reach prices above the starting price, especially if there is interest in the auction. A reasonable estimate could be between 1.5 to 2 times the starting price, depending on the interest from collectors.

Therefore, an estimated maximum purchase price could be between 150 and 200 euros. However, since there are no sales records, it is difficult to be more precise. A conservative maximum price could be approximately 150 euros.

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

1. Current condition: The coin has a condition of 80 (MBC+), indicating that it is in relatively good shape, but not of the highest quality (FDC).

2. Previous auction prices:
- Previous hammer prices varied significantly, ranging from 120 euros to 2927.3 euros, depending on the condition and the context of the auction.
- Most hammer prices for similar conditions (MBC+ and 85) are in the range of 777.86 to 1407.56 euros.

3. Average starting and hammer price:
- The average starting price is 386.37 euros, and the average hammer price is 1042.95 euros. This suggests that, in general, coins of this reference tend to sell for significantly higher prices than their starting price.

4. Sales trends:
- Out of the 9 times it has been auctioned, 7 have been sold, indicating good demand for this coin.

5. Comparison with previous hammer prices:
- Given that the coin's condition is 80, we can assume that its hammer price might be in a lower range than the hammer prices of higher conditions (90 and 85), but it could still be considerably high.

Taking all these factors into account, an estimated maximum purchase price for this coin could be in the range of 800 to 1200 euros. This is based on the trend of previous hammer prices and the current condition of the coin.

To estimate a maximum purchase price for the coin in question, we will consider 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 average hammer price in previous auctions is 104.02 euros, suggesting that, in general, coins of this reference tend to sell above their starting price.
- In the most recent auction (2022), a coin with a similar condition (85) sold for 68 euros, which may be an indicator of its current market value.

3. Starting Price: The starting price is 70 euros, which is a reasonable starting point for the auction.

4. Sales Trends: Out of the 10 times it has been auctioned, it has sold 4 times, indicating a moderate interest in this coin.

5. Comparison with Previous Prices: In previous auctions, hammer prices have varied, but there are examples of sales above 100 euros, especially for coins in better condition.

Taking all these factors into account, an estimated maximum purchase price could be around 100-120 euros. This is based on the hammer price history and the current condition of the coin. However, it is important to consider that the final price may be affected by competition in the auction and demand at the time of sale.

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 in previous auctions is 96.03 euros.
- The average starting price is 70.2 euros.
- In past auctions, we have seen hammer prices that varied significantly, ranging from 42 euros to 422.6 euros, depending on the condition and demand at that time.

3. Recent Trends:
- In the most recent auctions, the starting price has been 40 euros, with an estimated price of 60 euros. This suggests that interest in the coin remains, but there may be some downward pressure on the starting price.

4. Comparison with Previous Prices:
- In previous auctions with similar condition (75), hammer prices have ranged between 60 and 110 euros.

Taking all these factors into account, an estimated maximum purchase price could be around 100 euros. This price reflects a balance between the coin's condition, price history, and current market trend. However, it is important to stay alert to the auction dynamics and competition, as this can influence the final price.

To estimate a maximum purchase price for the coin that is going to be auctioned, we can consider several factors:

1. Condition of the coin: The coin in question has a condition rating of 80 (MBC+), which indicates that it is in relatively good shape. This is important because coins in better condition tend to fetch higher prices.

2. Previous auction prices: By looking at the hammer prices of coins with similar conditions, we can see that:
- In the past, coins with a condition rating of 80 have reached hammer prices of up to 280 euros (in 2011).
- The average hammer price for coins of similar condition seems to be around 85.8 euros.

3. Starting price and average starting price: The current starting price is 40 euros, and the average starting price in the past has been 68.32 euros. This suggests that the current starting price is relatively low compared to the historical average.

4. Sales trends: The coin has been auctioned 142 times, of which it has sold 78 times. This indicates that there is considerable interest in this coin, which may influence the hammer price.

Based on these factors, an estimated maximum purchase price could be in the range of 120 to 200 euros, considering that the condition is good and there are precedents for higher hammer prices in the past. However, given the starting price of 40 euros, it is likely that the hammer price will not significantly exceed 200 euros unless there is intense competition among bidders.

Therefore, a reasonable estimated maximum purchase price could be 150 euros.