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

1. Current starting price: 250 euros.
2. Average starting price in previous auctions: 417.39 euros.
3. Average hammer price in previous auctions: 506.76 euros.
4. Hammer price history: Hammer prices have varied, but many have been in the range of 460 to 810 euros, with a notable hammer price of 700 euros on some occasions.

Since the condition of the current coin is not specified, but considering that in the past, coins with similar condition (condition value 95) have had hammer prices ranging between 460 and 810 euros, we can make an estimation.

### Estimation of the maximum purchase price:
- Based on the average hammer price: 506.76 euros.
- Considering the range of previous hammer prices: We could consider a maximum purchase price in the high range, given that the starting price is relatively low (250 euros).

Therefore, an estimated maximum purchase price could be between 500 and 600 euros, taking into account that the highest hammer price in the past has been 810 euros, but also considering that the current starting price is 250 euros.

### Conclusion:
Estimated maximum purchase price: 600 euros.

To estimate a maximum purchase price for the coin that will be auctioned, we can analyze the provided data. Here are some key points to consider:

1. Starting price: 120 euros.
2. Average hammer price: 146.02 euros.
3. Auction history: The coin has been auctioned 75 times, of which it has sold 68 times. This indicates good demand.
4. Previous prices: Hammer prices in previous auctions have varied, but there are several examples where the hammer price has exceeded 150 euros, even reaching 270 euros in a recent auction.

Since the condition of this coin is not specified, it is difficult to make a direct comparison with previous auctions. However, we can observe that in previous auctions, coins with a condition of 95 have had hammer prices ranging from 130 to 270 euros.

### Estimation of the maximum purchase price:
- Based on the average hammer price: 146.02 euros.
- Considering the highest hammer price in history: 270 euros.
- Taking into account the starting price: 120 euros.

Given that the starting price is 120 euros and considering that the average hammer price is 146.02 euros, a reasonable maximum purchase price could be between the average hammer price and the highest hammer price.

### Estimated maximum purchase price:
Between 160 and 200 euros.

This allows for a margin for competition in the auction, considering that the hammer price may be higher depending on the demand and the condition of the coin.

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

1. Current starting price: 300 euros.
2. Average hammer price in previous auctions: 365.96 euros.
3. Hammer price history:
- The coin has reached hammer prices of up to 500 euros in previous auctions, with grades of 100 and 95.
- In several auctions, the hammer price has been in the range of 300 to 500 euros, depending on the grade.

4. Grade: There is no information about the grade of this coin, which may affect its value. However, most coins of this type in the past have had grades of 95 or 100, which are quite high.

5. Price trends:
- The general trend shows that the hammer price can be significantly higher than the starting price, especially for coins in good condition.
- The average hammer price (365.96 euros) suggests that buyers are willing to pay more than the starting price.

Given that there is no information about the grade of this coin, but considering the price history and the average hammer price, an estimated maximum purchase price could be in the range of 400 to 500 euros. This is based on the fact that, although the grade is unknown, the price history suggests that buyers are willing to pay higher prices for similar coins.

Maximum purchase estimate: 450 euros.

To estimate a maximum purchase price for the coin that will be auctioned, we can consider several factors based on the provided data:

1. Condition of the coin: The coin has a condition rating of 95 (EBC+), indicating that it is in very good shape. This generally translates to a higher price compared to coins in lower condition.

2. Previous auction prices:
- The average hammer price for similar coins has been 281.39 euros.
- In previous auctions, coins with a condition rating of 95 have reached hammer prices that varied, but some examples are:
- 305 euros (2020-12-15)
- 400 euros (2020-07-02)
- 270 euros (2018-12-11)
- 320 euros (2023-03-16)

3. Starting price: The starting price for the current auction is 250 euros, which is a reasonable starting point.

4. Price trends: Observing the trends, it seems that coins with a similar condition have often had hammer prices that exceed the starting price, especially in high condition.

Based on these factors, an estimated maximum purchase price could be in the range of 350 to 400 euros, considering that the highest hammer price in previous auctions for coins of similar condition has been 400 euros. This also takes into account the possibility that bidders may be willing to pay a bit more for a coin in such good condition.

Therefore, an estimated maximum purchase price could be approximately 400 euros.

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

1. Starting price: 300 euros.
2. Average starting price: 359.35 euros.
3. Average hammer price: 456.74 euros.
4. Auction history: The coin has been auctioned 27 times, of which it has sold 19 times. This indicates a sales rate of 70.37%, which is quite positive.
5. Condition: There is no specific information about the condition of this coin, but in the history, many of the auctioned coins have a condition of 95 or 100, suggesting that coins in good condition tend to reach higher prices.

Analyzing previous hammer prices, we can observe that:

- In recent auctions, hammer prices have ranged between 340 and 777 euros, depending on the condition and other factors.
- The highest recorded hammer price was 777 euros in 2015, while the lowest in the recent history was 325 euros.

Given that the average hammer price is 456.74 euros and considering that the coin has a starting price of 300 euros, an estimated maximum purchase price could be set in a range that reflects market interest and price trends.

Estimated maximum purchase price:

We could consider a maximum purchase price around 500-600 euros, as this aligns with the estimated prices from previous auctions and the average hammer price. This also takes into account that the coin could be in a condition similar to those that have sold in the past.

Therefore, a reasonable estimated maximum purchase price would be 550 euros.

To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially the previous auction prices and the context of the current auction.

1. Current starting price: 250 euros.
2. Average hammer price in the past: 269.58 euros.
3. Previous hammer prices: The highest hammer prices in recent auctions have been 380 euros (on several occasions) and 360 euros.
4. Condition: There is no information about the current condition of the coin, but in the past, many coins of the same reference have had a condition of 95, suggesting they could be in good condition.

Given that the average hammer price is 269.58 euros and considering that in previous auctions hammer prices have reached up to 380 euros, an estimated maximum purchase price could be positioned in a range between the average hammer price and the highest observed price.

Estimated maximum purchase price:
- A conservative price could be around 300 euros, which is slightly higher than the average hammer price.
- A more optimistic price, considering the highest prices reached in the past, could be up to 380 euros.

Therefore, a reasonable maximum purchase price could be between 300 and 380 euros.

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

1. Current starting price: 900 euros.
2. Average starting price in previous auctions: 928.57 euros.
3. Average hammer price in previous auctions: 1463.5 euros.
4. Auction history: The coin has been auctioned 10 times and has sold in all of them, indicating good demand.

### Analysis of previous prices:
- In the auctions of 2020 and 2018, the hammer prices were 1500 and 1460 euros, respectively, with starting prices of 800 and 1200 euros.
- In other auctions, hammer prices have ranged between 850 and 1900 euros, depending on the condition and starting price.

### Considerations:
- The condition of the current coin is not specified, which may influence its value. However, previous hammer prices for coins of similar condition (95) have been consistently high.
- Given that the starting price is 900 euros and the average hammer price is 1463.5 euros, there is considerable room for a higher hammer price.

### Estimation of the maximum purchase price:
Based on the history of hammer prices and the average hammer price, a reasonable maximum purchase price could be a percentage of the average hammer price. Considering that the starting price is 900 euros, a maximum purchase price could be between 80% and 90% of the average hammer price.

Calculating:
- 80% of 1463.5 euros = 1170.8 euros
- 90% of 1463.5 euros = 1316.15 euros

### Conclusion:
An estimated maximum purchase price for the coin could be between 1170 and 1316 euros, depending on the demand at the auction and the final condition of the coin.

To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially the previous auction prices and the general trend of the auctions.

1. Current starting price: 300 euros.
2. Average hammer price in the past: 316.8 euros.
3. Previous hammer prices:
- In several auctions, hammer prices have ranged from 250 to 420 euros, with a notable hammer price of 500 euros in a recent auction.
4. Condition: There is no specific information about the condition of this coin, which may affect its value. However, there have been previous auctions with conditions of 95 and 100 that have reached high hammer prices.

Given that the average hammer price is 316.8 euros and considering that recent auctions have reached hammer prices of up to 500 euros, an estimated maximum purchase price could be set in a range above the average hammer price, but not as high as the historical maximum, especially since there is no information on the condition.

Estimated maximum purchase price: 400 euros.

This price reflects a balance between the average hammer price and the higher prices reached in previous auctions, taking into account the lack of information about the current condition of the coin.

To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially previous auction prices and the condition of the coin.

1. Current starting price: 1500 euros.
2. Average auction price in the past: 1599.72 euros.
3. Previous auction prices:
- The coin has reached auction prices of up to 2000 euros in a condition of 95.
- In recent auctions, auction prices of 2100 euros and 2400 euros have been seen in conditions of 95 and 85, respectively.

4. Condition of the coin: There is no information about the current condition, which complicates the estimation a bit. However, since similar coins have been sold in the past in a condition of 95 for prices above 2000 euros, we can assume that if the condition is good, the price could be in that range.

5. Price trends: Noting that the average auction price has been 1599.72 euros and that higher prices have been reached in recent auctions, we can consider that interest in this coin may be increasing.

### Estimation of the maximum purchase price:
Given that the highest auction price in the past has been 2400 euros and considering that the starting price is 1500 euros, a reasonable maximum purchase price could be in the range of 2000 to 2400 euros, depending on the condition.

Estimated maximum purchase price: 2200 euros.

This price reflects a balance between market interest, previous auction prices, and uncertainty about the current condition of the coin.

To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially previous auction prices and conservation conditions.

1. Current starting price: 1500 euros.
2. Average auction price in the past: 1217.23 euros.
3. Previous auction prices:
- In recent auctions, the hammer prices have ranged from 1800 to 2100 euros for coins in condition 95.
- In the most recent auction, the hammer price was 1800 euros with a condition of 95.

4. Condition: No specific information is provided about the condition of this coin, which may complicate the estimation. However, considering that similar coins have been sold in condition 95 for hammer prices of up to 2100 euros in the past, we can infer that the price could be in a similar range if the condition is good.

5. Price trends: Observing the trends, it seems that prices have been increasing in recent years, especially for coins in good condition.

Given all this, an estimated maximum purchase price could be in the range of 1800 to 2100 euros, assuming the condition of the coin is at least good. If the condition is lower, the price should be adjusted downward.

Therefore, a reasonable maximum purchase price could be 2000 euros.