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

1. Current Condition: The coin has a condition rating of 75 (VF), indicating that it is in acceptable shape, but not in the best condition.

2. Auction History:
- The average hammer price in previous auctions is 480.38 euros, suggesting that, in general, this coin can reach high prices.
- In past auctions, we have seen hammer prices that varied significantly, from 63 euros to 2800 euros, depending on the condition and other factors.

3. Starting Price and Previous Prices:
- The current starting price is 60 euros, which is relatively low compared to the average hammer price.
- In the most recent auction (2023), the coin sold for 209 euros with a similar condition (75).

4. Sales Trends: The coin has been auctioned 15 times, of which it has sold 8 times, indicating a consistent interest in the coin.

Based on these factors, an estimated maximum purchase price could be in the range of 200 to 300 euros, considering that the most recent hammer price was 209 euros and that the average hammer price is significantly higher. However, since the condition is not the highest, it is wise not to exceed 300 euros in the bid.

Therefore, a reasonable estimated maximum purchase price would be 250 euros.