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 of 70 (VF-), indicating that it is in relatively good shape. This suggests that its value could be in the upper range of coins with a similar condition.

2. Auction History:
- The average hammer price for coins with a similar condition (70) has been approximately 46.42 euros.
- In previous auctions, the hammer prices for coins with a condition of 70 have varied, but the highest recorded price was 60 euros in a prior auction.

3. Starting Price and Average Starting Price: The current starting price is 35 euros, and the average starting price in the past has been 34.23 euros. This indicates that the current starting price is reasonable and aligns with historical trends.

4. Sales Trends: The coin has been sold in 26 out of the last 31 auctions, indicating good demand and consistent interest in this reference.

5. Maximum Price Estimate: Given that the average hammer price for coins of similar condition is 46.42 euros and the highest recorded price was 60 euros, a reasonable maximum purchase price could be in the range of 55 to 60 euros, considering that the condition is good and there is interest in the coin.

Conclusion: Based on these factors, an estimated maximum purchase price for the coin could be 55 to 60 euros.

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

1. Current starting price: 25 euros.
2. Coin condition: 70 (MBC-), indicating good preservation.
3. Auction history:
- In the September 2020 auction, the coin started at 15 euros and sold for 42 euros.
- In October 2020, it started at 25 euros and sold for 44 euros, with the same condition (70).
- In April 2024, it started at 18 euros and sold for 40 euros, but with a lower condition (25).

4. Average hammer price: 42 euros, indicating that, in general, coins of this reference tend to sell above their starting price.

Given that the coin to be auctioned has a condition of 70, which has proven to be attractive in the past, and considering that the average hammer price is 42 euros, an estimated maximum purchase price could be set in a range between the starting price and the average hammer price.

Taking these factors into account, a reasonable maximum purchase price could be approximately 45-50 euros. This is based on the history of previous auctions and the good 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 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 for this coin in the past has been 104.4 euros.
- Previous auctions show that coins with a similar condition (75) have reached hammer prices that vary, but some examples are:
- 85 euros (2018-12-11)
- 92 euros (2017-10-18)
- 75 euros (2020-10-27)
- 110 euros (2018-12-12)
- The current starting price is 60 euros, which is below the average hammer price.

3. Recent Trends: The coin has been auctioned 93 times, of which 87 have been successful sales. This indicates good demand and consistent interest in the coin.

4. Recent Starting and Hammer Prices: The average starting price is 62.4 euros, suggesting that the current starting price of 60 euros is competitive.

Based on these factors, an estimated maximum purchase price could be in the range of 100 to 120 euros, considering that the average hammer price has been 104.4 euros and that the coin's condition is good.

Therefore, a reasonable maximum purchase price could be 120 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 80 (MS+), indicating that it is in quite good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous Auction Prices: By observing the previous auction prices of coins with a similar condition (80), we can see that they have reached auction prices of up to 420 euros in recent sales.

3. Average Auction Price: The average auction price for this coin is 201.73 euros, providing a solid benchmark.

4. Current Starting Price: The starting price is 150 euros, which is reasonable given the historical auction prices.

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

Based on these factors, an estimated maximum purchase price could be in the range of 300 to 350 euros. This is based on the coin's potential to reach higher prices depending on its condition and market interest. However, it is important to keep in mind that the final price will depend on the competition in the auction and the demand at that specific moment.