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

1. Condition of the coin: The coin has a condition rating of 90 (EBC), which indicates that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Starting price: The starting price is 400 euros. This is the baseline for the auction.

3. Price history: By looking at previous auction prices for coins with a similar condition (90), we can see that they have reached significantly higher prices in the past. For example, in previous auctions, coins with a condition of 90 have reached hammer prices of up to 800 euros.

4. Average hammer price: The average hammer price for this coin is 231.8 euros, indicating that, in general, coins of this reference tend to sell for a price lower than the starting price.

5. Recent trends: In the most recent auctions, hammer prices have shown a trend of increasing, especially for coins in good condition.

Based on these factors, an estimated maximum purchase price for this coin could be between 600 and 800 euros, considering that the condition is high and there is a price history that supports this estimate. However, since the starting price is 400 euros, it is likely that the hammer price will not significantly exceed this range unless there is strong competition in the auction.

Therefore, a reasonable maximum purchase price could be 700 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 90 (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 for similar coins in the past is €2380.79.
- The coin has been auctioned 36 times, of which it has sold 26 times, indicating good demand.
- Previous hammer prices for coins with a condition rating of 90 have reached up to €5194.72.

3. Starting Price: The current starting price is €400, which is significantly lower than the average hammer price.

4. Price Trends: Observing the hammer prices of coins with similar conditions, it can be seen that prices have fluctuated, but generally, coins in good condition tend to reach higher prices.

Based on these factors, an estimated maximum purchase price could be in the range of €2000 to €3000, considering that the average hammer price is €2380.79 and that the coin's condition is good. However, given the history of higher hammer prices, a maximum purchase price could reasonably be estimated at €3000.

To estimate a maximum purchase price for the coin in question, we can analyze the provided data, including the starting price, the average hammer price, and previous prices from similar auctions.

1. Current data of the coin:
- Starting price: €5000
- Condition: 95 (EF+)

2. Historical data:
- Average hammer price: €4704.59
- Previous prices from auctions of coins with similar conditions (around 90-95):
- They have sold for prices that vary significantly, with some hammer prices exceeding €10,000 for conditions of 90 and above.

3. Analysis of previous prices:
- In the past, coins with conditions of 90 have reached hammer prices of up to €17,000 or more, depending on demand and rarity.
- The last reference auction shows a starting price of €6000 and an estimated price of €12000, indicating that the market is willing to pay more for high-condition coins.

4. Maximum price estimation:
- Given that the condition of the coin is high (95), and considering the starting price and the average hammer price, a reasonable maximum purchase price could be in the range of €10,000 to €12,000.
- However, given the historical hammer price records for similar conditions, a maximum purchase price could be up to €15,000 if demand is high.

Conclusion: An estimated maximum purchase price for this coin could be between €12,000 and €15,000, depending on the competition in the auction and the interest from collectors.

To estimate a maximum purchase price for the coin that will be auctioned, we can analyze the provided data, especially previous auction prices and the average hammer price.

1. Starting price: 500 euros.
2. Average hammer price: 406.31 euros.
3. Previous hammer prices:
- There are several hammer prices in the range of 170 to 4200 euros, with a focus on the most recent and relevant prices.
- The highest hammer prices in the past have been significantly above the current starting price.

4. Condition: No information is provided about the condition of the current coin, which may affect its value. However, by observing the hammer prices of coins with similar conditions (75-90), we can infer a price range.

5. Trends: The overall trend shows that hammer prices can vary considerably, but the highest prices have been recorded for coins in good condition.

### Maximum Purchase Price Estimation:
Given that the starting price is 500 euros and considering that the average hammer price is 406.31 euros, a reasonable maximum purchase price could be slightly higher than the starting price, as buyers are often willing to pay more in competitive auctions.

Maximum purchase price estimate: 700 euros.

This price takes into account the possibility that the coin may have significant value in the market, especially if there is interest among collectors.

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 90 (EF), indicating that it is in good shape. This is a positive factor that can increase its value.

2. Auction History:
- The average hammer price in previous auctions is 696.65 euros, suggesting that, in general, coins of this reference tend to sell for significantly higher prices than the starting price.
- In the past, there have been recorded auctions of this coin that reached up to 2739.49 euros (in 2011), although this may be an exceptional case.

3. Starting Price and Average Starting Price: The current starting price is 250 euros, which is relatively low compared to the average hammer price. This could indicate a good buying opportunity.

4. Sales Trends: The coin has been sold in 17 out of 19 auctions, indicating good demand.

5. Comparison with Previous Prices: Looking at previous hammer prices, especially those with a similar condition (90), the lowest hammer price was 600 euros in 2011, suggesting that a hammer price in the range of 600 to 900 euros could be reasonable.

Taking all these factors into account, an estimated maximum purchase price for this coin could be between 800 and 1000 euros. This is based on the good condition, the auction price history, and the demand observed in previous auctions.

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

2. Auction History:
- The average hammer price for similar coins has been 669.28 euros.
- In the past, hammer prices have varied significantly, ranging from 65 euros to over 3800 euros, depending on the condition and demand at the time of the auction.

3. Starting Price: The starting price is 500 euros, which may indicate the seller's expectations regarding the coin's value.

4. Recent Trends: In the most recent auctions, hammer prices have exceeded the starting price, suggesting that there is interest in the coin.

5. Comparison with Previous Prices:
- In previous auctions, coins with a similar condition have reached hammer prices ranging from 350 to 1500 euros, depending on demand and other factors.

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 range considers the current condition, the auction price history, and the starting price. However, the final price will depend on the competition in the auction and the interest of collectors at that time.

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 50 (fine), which indicates that it is not in the best condition. This will negatively affect its value compared to coins in better condition.

2. Auction History:
- The coin has been auctioned 6 times, of which it has sold 5 times. This indicates a consistent interest in the coin.
- Previous hammer prices are quite high, especially the one from 2013, where it sold for 22,509.25 euros with a condition of 90. This suggests that, in optimal conditions, the coin can reach very high prices.
- However, hammer prices for lower conditions (such as 75 and 80) are significantly lower, indicating that condition is a crucial factor in pricing.

3. Starting Price and Average Price:
- The current starting price is 1,000 euros, which is relatively low compared to the average hammer price of 6,558.04 euros. This suggests that there is potential for the hammer price to be higher, but it also depends on the condition.

4. Comparison with Previous Prices:
- In previous auctions, starting prices have varied, but the lowest hammer price was 1,200 euros (in 2014), indicating that even in non-optimal conditions, the coin has a minimum value.

Given all this, and considering that the current condition is 50, an estimated maximum purchase price could be set in a more conservative range.

Estimated Maximum Purchase Price: It could be reasonable to estimate a maximum purchase price around 2,500 to 3,000 euros, taking into account the condition and price history. This would allow for a profit margin if the coin is resold in the future, especially if its condition improves or if the market becomes more favorable.

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

2. Current Starting Price and Previous Prices: The current starting price is 1500 euros, and the average hammer price in previous auctions is 1151.74 euros. This suggests that the starting price is relatively high compared to the average hammer price.

3. Sales History: The coin has been auctioned 18 times, of which it has sold 14 times. This indicates good demand, which can influence the price.

4. Previous Hammer Prices: Looking at previous hammer prices, the highest recorded price was 3200 euros, although this was for a coin with unspecified condition. However, there are also lower prices around 800-1000 euros for lower conditions.

5. Price Trends: The average starting price in previous auctions is 926.85 euros, suggesting that the current starting price of 1500 euros is significantly higher than the historical average.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 1200 to 1600 euros. This is based on the good condition of the coin and the demonstrated interest in previous auctions, but also considering that the current starting price is higher than the historical average.

Therefore, a reasonable maximum purchase price could be 1600 euros.

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

1. Current starting price: 3500 euros.
2. Auction history: The coin has been auctioned 16 times, of which it has sold 14 times. This indicates good demand.
3. Previous prices: Previous hammer prices varied significantly, with a maximum price of 3815.45 euros in 2014 and a minimum price of 110 euros in 2023. However, the highest hammer prices have been for coins in grade 90.
4. Condition: There is no information on the current condition of the coin, which can significantly affect its value. However, most previous auctions with grade 90 coins have reached high prices.
5. Average hammer price: The average hammer price is 1297.19 euros, suggesting that the current starting price of 3500 euros is quite high compared to the historical average.

Given that the starting price is 3500 euros and considering the auction price history, an estimated maximum purchase price could be in the range of 2500 to 3000 euros, depending on the condition of the coin and demand at the auction. This is based on the fact that the starting price is significantly higher than previous hammer prices, and without information on the condition, it is prudent not to exceed the current starting price.

Therefore, an estimated maximum purchase price could be 3000 euros.

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

1. Starting Price: 3500 euros. This is the initial price of the auction.
2. Condition: The coin has a condition rating of 85 (MBC+/EBC-), indicating that it is in quite good shape, which may increase its value.
3. Auction History: The coin has been auctioned 2 times in the past and has sold on both occasions. This suggests that there is demand for this coin.
4. Previous Prices: In the 2013 auction, the starting price was 4800 euros and the final price was 6500 euros. This indicates that the value of the coin has been significantly higher in the past.

Given that the average final price in the past has been 5550 euros and considering the current condition, an estimated maximum purchase price could be in a range between the average final price and the highest previous final price.

Taking all these factors into account, an estimated maximum purchase price could be approximately 6000 euros. This reflects a value that considers the good condition and price history, but it is also prudent not to exceed the previous final price.