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

1. Current Condition: The coin has a condition of 70 (VF-). This indicates that it is in relatively good shape, but not of the best quality (UNC).

2. Previous Auction Prices:
- In previous auctions, we have seen hammer prices that vary considerably. For example:
- In 2018, a coin with a condition of 80 was auctioned for 180 euros.
- In 2014, a coin with a condition of 95 was auctioned for 1400 euros.
- In 2022, a coin with a condition of 70 was auctioned for 45 euros.

3. Price Trends:
- The average hammer price for similar coins is 163.4 euros, suggesting that there is an active market and that prices can be high depending on the condition and demand.

4. Estimation Based on Condition:
- Given that the condition of the coin is 70, we can estimate that the hammer price could be in a lower range than that of coins in better condition (80 or 95).
- Based on the average hammer price of 163.4 euros and considering that condition is an important factor, an estimated maximum purchase price could be around 100-120 euros.

Conclusion: An estimated maximum purchase price for this coin, considering its condition and previous auction prices, could be between 100 and 120 euros.