To estimate a maximum purchase price for the coin in question, we can consider several factors based on the provided data:

1. Starting price: 200 euros.
2. Current condition: 75 (VF), indicating a good but not excellent condition.
3. Auction history: The coin has been auctioned 2 times in the past and has sold on both occasions. This suggests that there is demand for this coin.
4. Average starting and hammer price: The average starting price is 175 euros and the average hammer price is 290 euros. This indicates that, in general, coins of this reference tend to sell for above their starting price.
5. Recent hammer price: In the auction on December 13, 2023, the coin sold for 220 euros with a starting price of 150 euros. This shows that, despite a slightly better condition (80), the hammer price was higher than the starting price.

Given that the condition of the coin in question is 75 (VF), which is lower than the condition of 80 from the previous auction, it is reasonable to adjust the expected hammer price downward. However, since there has been consistent interest in this coin and it has sold in the past, we can estimate a maximum purchase price.

Taking all these factors into account, an estimated maximum purchase price could be around 250-270 euros. This is based on the previous average hammer price and the current condition, adjusting for the difference in quality.