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

1. Current Condition: The coin has a condition of 75 (MS), indicating that it is in fairly good shape, but not the best possible condition.

2. Previous Auction Prices:
- In previous auctions, we have seen hammer prices that vary significantly. For example:
- In 2015, a coin with a condition of 75 sold for 151.65 euros.
- In 2021, a coin with a condition of 95 sold for 150 euros.
- In 2016, the hammer price was 282.93 euros, but the condition was not specified.

3. Average Hammer Price: The average hammer price for this coin is 104.14 euros, which gives us an idea of the general market value.

4. Price Trends: Observing the starting and hammer prices, it seems that prices have been increasing over time, especially for coins in good condition.

5. Current Starting Price: The starting price is 75 euros, suggesting that the seller expects a reasonable price, but it could be lower than the expected hammer price.

Based on this data, an estimated maximum purchase price for this coin, considering its condition and previous hammer prices, could be between 150 and 180 euros. This is based on the fact that coins in similar conditions have reached higher hammer prices in the past.

Therefore, a reasonable maximum purchase price could be approximately 160 euros.

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

1. Coin Condition: The coin has a condition rating of 70 (MS-), indicating that it is in acceptable condition but not of high quality. This generally affects the price, as coins in better condition tend to fetch higher prices.

2. Auction History:
- The average hammer price for this coin in the past has been 166.58 euros.
- The coin has been auctioned 123 times, of which it has sold 109 times, indicating good demand.
- Previous hammer prices for coins with a similar condition (70) have varied, but recent auctions have seen hammer prices of 50 euros.

3. Starting Price and Estimated Prices:
- The current starting price is 40 euros, which is relatively low compared to the average hammer price.
- The average starting price in the past has been 65.53 euros, suggesting that the current starting price could be attractive to buyers.

4. Recent Trends:
- In the most recent auctions, hammer prices for coins with similar condition have ranged from 30 to 55 euros.

Based on these factors, an estimated maximum purchase price for this coin could be between 80 and 120 euros. This is because, although the condition is not the best, the demand and price history suggest that buyers may be willing to pay a bit more than the previous average hammer price, especially if the coin is considered a good buying opportunity in the current context.

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

1. Condition: The coin has a condition rating of 70 (VF-), indicating that it is in acceptable condition, but not among the best qualities. This may influence the price, as coins in better condition tend to fetch higher prices.

2. Starting price and previous prices: The current starting price is 100 euros. In previous auctions, starting prices have varied, with an average of 86.88 euros. The average hammer price has been 60 euros, suggesting that coins do not always reach their starting price.

3. Auction history: The coin has been auctioned 8 times, of which it has sold 3 times. This indicates a moderate interest in the coin, but also that there is a significant number of auctions where it has not sold.

4. Previous hammer prices: In past auctions, hammer prices have varied. For example, in 2022 it sold for 70 euros, and in 2023 it was auctioned with a starting price of 150 euros, but the hammer price is not indicated.

5. Market trends: Given that the current starting price is 100 euros and considering the average hammer price of 60 euros, it is reasonable to assume that the hammer price could be in a similar range or slightly higher, given that the condition is acceptable.

Taking all these factors into account, an estimated maximum purchase price could be between 70 and 90 euros. This is based on the history of hammer prices and the condition of the coin. A price of 80 euros could be a reasonable starting point for an offer, considering it is slightly higher than the previous average hammer price.