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 75 (VF), indicating that it is in an acceptable state, but not of the highest quality.

2. Auction History:
- The average hammer price for similar coins has been 224.41 euros.
- In previous auctions, coins with a similar condition (75) have had hammer prices that vary, but some examples are:
- 130 euros (2019-07-04)
- 190 euros (2018-03-08)
- 160 euros (2020-02-13)
- 200 euros (2022-06-15)

3. Starting Price: The current starting price is 100 euros, which may attract bidders.

4. Price Trends: Observing the hammer prices of coins with similar conditions, it seems that the hammer price range for coins in VF condition may be between 130 and 200 euros, with some exceptional cases reaching up to 260 euros.

5. Average Hammer Price: Given that the average hammer price is 224.41 euros, this suggests that there is potential for the coin to reach a higher price, especially if there is interest in the auction.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 200 to 250 euros. This takes into account the current condition, the auction price history, and the potential interest in the auction.