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 70 (VF-), indicating that it is in relatively good shape.

2. Auction History:
- The average hammer price for coins with a similar condition (70) has been 20 euros on several occasions.
- In previous auctions, hammer prices for coins with a condition of 70 have ranged between 18 and 20 euros.

3. Average Starting and Hammer Price:
- The average starting price is 10.63 euros, and the average hammer price is 23.08 euros. This suggests that, in general, coins tend to sell for a price higher than the starting price.

4. Recent Trends: In the most recent auctions, the hammer price has been 40 euros for a coin with a condition of 30, indicating a growing interest in these coins.

Based on this data, an estimated maximum purchase price for the coin with a condition of 70 could be between 20 and 25 euros, considering that the average hammer price for coins in similar conditions has been around 20 euros and that there is potential for the price to rise a bit more based on demand.

Therefore, a reasonable estimated maximum purchase price could be 25 euros.

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

1. Coin Condition: The coin has a condition rating of 70 (MBC-), indicating that it is in relatively good shape.

2. Auction History:
- It has been auctioned 11 times in the past, of which it has sold 7 times.
- The average hammer price in previous auctions is 55.71 euros, suggesting that, in general, coins of this reference tend to reach higher prices.

3. Previous Auction Prices:
- In several auctions, the hammer price has reached up to 130 euros (in 2022), indicating significant potential for high prices, especially in good condition.
- Most hammer prices for coins with similar condition (70) have been in the range of 22 to 90 euros.

4. Starting Price: The current starting price is 8 euros, which is quite low compared to previous hammer prices.

5. Trends: Given that the average hammer price is 55.71 euros and considering that the condition is 70, an estimated maximum purchase price could be in the range of 70 to 90 euros, as this is a price that has been reached in previous auctions for coins in similar conditions.

Estimated Maximum Purchase Price: Based on the previous analysis, a reasonable maximum purchase price could be 80 euros. This sits at a midpoint between the average hammer price and the higher prices reached in the past, taking into account the condition of the coin.

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-). This is an important factor, as coins in better condition tend to reach higher prices.

2. Auction History:
- In the auction on November 26, 2021, a coin with a condition of 75 sold for 9 euros.
- In the auction on July 7, 2022, a coin with a condition of 80 sold for 18 euros.
- In the auction on October 18, 2022, a coin with a condition of 70 did not sell, but had an estimated price of 15 euros.

3. Starting Price and Average Price: The current starting price is 6 euros, and the average starting price in the past has been 11 euros, with an average hammer price also of 11 euros.

Given that the condition of the coin is 70, which is similar to the last auction where it did not sell but had an estimated price of 15 euros, and considering that in previous auctions prices of 9 and 18 euros have been reached for higher conditions, we can estimate that the maximum purchase price could be in a range between 10 and 15 euros.

Therefore, a reasonable estimated maximum purchase price for this coin could be 15 euros.