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

1. Current Condition: The coin has a condition of 75 (VF), which indicates that it is in an acceptable state, but not of high quality. This may influence the price, as coins in better condition tend to fetch higher prices.

2. Previous Hammer Prices: By observing the hammer prices of coins with a similar condition (75 and 80), we can see that:
- In 2018, a coin with a condition of 75 was auctioned for 14 euros.
- In 2022, another coin with a condition of 75 was auctioned for 75 euros.
- In 2023, a coin with a condition of 90 was auctioned for 230 euros, indicating that the price can increase significantly with better condition.

3. Average Hammer Price: The average hammer price for this coin is 346.66 euros, but this includes coins in better condition. Given that the condition of the coin in question is 75, it is reasonable to expect that the hammer price will be below this average.

4. Auction Trends: The coin has been auctioned 47 times, of which 44 have sold. This suggests that there is a consistent interest in this coin, which may increase its value at auction.

5. Starting Price: The starting price is 35 euros, which may be a good indicator of an expected minimum price.

Based on these factors, an estimated maximum purchase price for the coin with a condition of 75 could be between 100 and 150 euros, considering that this is a reasonable price for a coin in this state and that it has had previous hammer prices in a similar range. However, if there is strong competition at the auction, the price could exceed this estimate.