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 rating of 90 (EF), indicating that it is in quite good shape. This generally translates to a higher value compared to coins in lower condition.

2. Auction history:
- The average hammer price in previous auctions is 38.67 euros.
- In the past, hammer prices have varied, but there are examples of auctions reaching up to 85 euros (in 2011) and more recent ones ranging between 20 and 28 euros.

3. Price trends:
- The coin has a starting price of 30 euros in this auction, which is consistent with the average starting price of 30.25 euros.
- The condition rating of 90 suggests that it could reach a higher price than average, especially when compared to lower condition coins that have fetched lower hammer prices.

4. Analysis of previous prices:
- In previous auctions, coins with a similar condition (90) have reached hammer prices of 25 euros (2014) and 60.31 euros (2016). This suggests that the price range can be wide, but the condition is a key factor.

Based on these points, an estimated maximum purchase price for this coin could be in the range of 60 to 80 euros, considering that the condition is good and that the price history shows it has reached higher values in the past.

Therefore, a reasonable maximum purchase price could be 70 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 75 (MBC), indicating that it is in fairly good shape, but not among the best qualities (FDC).

2. Auction History:
- The average hammer price in the past has been 91.97 euros.
- It has been auctioned 94 times, of which 54 have sold, indicating a consistent interest in the coin.
- The highest hammer prices in the past have reached significant figures, such as 840 euros in 2012, although this may be an exceptional case.

3. Starting Prices and Estimates:
- The current starting price is 25 euros, which is quite low compared to the average hammer price.
- The average starting price in the past has been 50.92 euros.

4. Recent Trends: In the most recent auctions, hammer prices have ranged from 50 to 130 euros, depending on the condition.

Based on this data, an estimated maximum purchase price for this coin, considering its condition and historical interest, could be in the range of 80 to 120 euros. This is based on the average hammer price and the price trend in recent auctions.

Therefore, a reasonable maximum purchase price could be 100 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 rating of 80 (MBC+), indicating that it is in quite good shape.

2. Auction History:
- The average hammer price in previous auctions is 36.79 euros.
- The last auction for this coin had a hammer price of 65 euros with a condition rating of 90, suggesting that a higher condition can lead to higher prices.
- In previous auctions, hammer prices have varied, but the range seems to be between 24 and 65 euros.

3. Starting Price: The current starting price is 30 euros, which is a good starting point.

4. Trends: Given that the coin has been auctioned 13 times and sold 12 of those times, there is good demand. Additionally, the fact that there are no scheduled auctions in the coming days may indicate that this is a unique opportunity for buyers.

Based on these factors, an estimated maximum purchase price could be in the range of 50 to 70 euros, considering that the condition is good and that the highest hammer price in the past was 65 euros. Therefore, a reasonable maximum purchase price could be 65 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 of 75 (aVF), indicating that it is in fairly good shape, but not the best possible condition.

2. Auction History:
- The average hammer price in previous auctions is 36.79 euros.
- The last auction with a similar condition (75) had a hammer price that is not specified, but the starting price was 20 euros.
- In previous auctions, hammer prices have varied, but the range has been between 24 and 40 euros for similar conditions.

3. Current Starting Price: The starting price is 20 euros, which may attract more bidders.

4. Price Trends: The average starting price in previous auctions is 23.96 euros, suggesting that bidders are willing to pay a little more than the starting price.

Based on these factors, an estimated maximum purchase price could be in the range of 35 to 45 euros, considering that the condition is good and that the hammer price history suggests that bidders have been willing to pay more in the past.

Therefore, a reasonable maximum purchase price could be 40 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 of 75 (MBC), which indicates that it is in an acceptable state, but not of the highest quality.

2. Auction History:
- The average hammer price for coins of similar condition (75) in the past has been approximately 38 euros (in 2016).
- In other auctions, hammer prices have varied, but hammer prices of 20 to 47.67 euros have been seen for conditions ranging from 75 to 85.

3. Starting Price and Previous Prices:
- The current starting price is 15 euros, which is quite low compared to previous hammer prices.
- The average starting price in the past has been 26.91 euros, suggesting that the current starting price could be a good opportunity.

4. Sales Trends: The coin has been auctioned 18 times, of which 11 have been sold. This indicates a consistent interest in the coin, which may influence the price.

Based on these factors, an estimated maximum purchase price could be between 35 and 45 euros, considering that the highest hammer price in the past for a similar condition was 47.67 euros and that the current starting price is low. This also takes into account the trend of hammer prices in previous auctions.

Therefore, a reasonable maximum purchase price could be 40 euros.

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. Auction History:
- The average starting price for similar coins is 32.52 euros, and the average final price is 36.5 euros.
- In the past, coins with similar conditions (75-90) have been auctioned at prices that varied considerably, but some relevant examples are:
- A coin with a condition of 75 sold for 20 euros and another for 18 euros.
- A coin with a condition of 90 sold for 80 euros.
- A coin with a condition of 80 sold for 41.41 euros.

3. Sales Trends: Out of the 19 times this coin has been auctioned, it has sold 9 times, indicating moderate interest in the coin. However, the fact that it did not sell 10 times may suggest that the starting price is an important factor.

4. Current Starting Price: The starting price is 30 euros, which is slightly below the average starting price of 32.52 euros.

Based on these factors, an estimated maximum purchase price could be in the range of 40 to 50 euros. This is because, given the condition and price history, it is reasonable to expect that a buyer would be willing to pay a little more than the starting price, especially considering that the coin is in relatively good condition.

Therefore, an estimated maximum purchase price could be 45 euros.