To estimate a maximum purchase price for the coin in question, we can analyze the provided data, including auction history and previous hammer prices.

1. Current Condition: The coin has a condition rating of 70 (VF-). This indicates that it is in an acceptable state, but not among the best qualities.

2. Price History:
- The average hammer price for similar coins in the past has been 96.18 euros.
- Previous hammer prices for coins with a similar condition (70) have varied, with some examples being:
- 50 euros (2020-05-26)
- 60 euros (2020-09-17)
- 65 euros (2021-06-22)
- 75 euros (2022-04-27)
- 80 euros (2022-10-18)

3. Price Trends:
- Hammer prices have shown a trend of increasing over time, especially for coins in better condition.
- The last auction of a coin with a similar condition reached a hammer price of 80 euros.

4. Starting Price: The starting price is 35 euros, suggesting that there is considerable room for the hammer price to be higher.

5. Estimation: Given that the condition is 70 and considering previous hammer prices, a reasonable maximum purchase price could be in the range of 80 to 100 euros. This is based on the hammer price history for coins in similar conditions and the overall increase in interest in collectible coins.

Conclusion: An estimated maximum purchase price for this coin could be 90 euros. This allows for competition in the auction and aligns with previous hammer prices for coins of similar condition.