To estimate a maximum purchase price for the coin in question, we can analyze the provided data, taking into account the current condition of the coin (75, VF) and the hammer prices from previous auctions.

1. Condition: The coin has a condition of 75 (VF). In the past, coins with similar conditions have had hammer prices that vary, but they generally fall within a range that may be indicative of their value.

2. Previous hammer prices: Looking at the hammer prices of coins with similar conditions:
- A coin with a condition of 80 was sold for 175 and 200 euros.
- Another with a condition of 85 was sold for 250 euros.
- One with a condition of 95 was sold for 400 euros.

3. Price trend: The average hammer price for this coin is 198.25 euros, suggesting that the market is willing to pay close to this value. Additionally, the current starting price is 180 euros, indicating that the seller has reasonable expectations for a hammer price.

4. Estimation: Given that the condition of the coin is 75, which is lower than the conditions of the coins that have sold for higher prices, it is reasonable to adjust the expected hammer price downward. However, since the average hammer price is 198.25 euros and considering that condition is an important factor, a maximum purchase price could be set in a range between 150 and 180 euros.

Conclusion: Based on the analysis, an estimated maximum purchase price for this coin could be approximately 180 euros. This aligns with the starting price and reflects the current condition of the coin.