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

1. Current Condition: The coin has a condition of 70 (VF-), indicating that it is in an acceptable state, but not of the highest quality.

2. Auction History:
- The average hammer price for similar coins in the past is 85.84 euros.
- In previous auctions, coins with a similar condition (70) have had hammer prices that vary, but some examples are:
- 20 euros in December 2019.
- 25 euros in September 2019.
- 15 euros in December 2020.
- 29 euros in January 2023.

3. Price Trends:
- The average starting price is 97.72 euros, suggesting that sellers are looking for higher prices, but this does not always translate into hammer prices.

4. Comparison with Recent Hammer Prices:
- In recent auctions, the hammer price for coins of similar condition has been in the range of 20 to 30 euros, with some spikes for coins in better condition.

5. Sales Expectations:
- Given that there are 3 auctions scheduled in the coming days, this may increase competition and potentially the hammer price.

Based on these factors, an estimated maximum purchase price for this coin could be between 30 and 40 euros. This is based on the historical hammer prices for coins of similar condition and the current market trend.