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-). This indicates that it is in an acceptable state, but it is not of the highest quality.

2. Auction History:
- The average hammer price for similar coins in the past is 93.08 euros.
- In previous auctions, coins with a similar condition (70) have had hammer prices that vary, but some examples are:
- 55 euros (2020-12-14)
- 42 euros (2020-12-14)
- 57 euros (2019-12-10)
- 65 euros (2019-10-15)
- 110 euros (2019-03-14)

3. Starting Price and Average Starting Price:
- The current starting price is 45 euros, and the average starting price is 64.19 euros.

4. Recent Trends: In the most recent auctions, the hammer price has shown a range that may be higher due to demand or the quality of the coin.

Based on this data, an estimated maximum purchase price could be in the range of 80 to 120 euros, considering that the average hammer price is 93.08 euros and that the condition of the coin is acceptable.

Therefore, a reasonable maximum purchase price could be 100 euros. This allows for a margin for competition in the auction, given that the hammer price may vary depending on demand at the time of the auction.