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

1. Coin Condition: The coin has a condition of 70 (MBC-), indicating that it is in an acceptable state, but not of the highest quality. This can influence the price, as coins in better condition tend to fetch higher prices.

2. Auction History:
- The average hammer price for similar coins has been 113.48 euros.
- In previous auctions, coins with a similar condition (70) have had hammer prices that varied, but some examples are:
- 140 euros (2023-03-16)
- 110 euros (2023-01-31)
- 85 euros (2020-09-17)
- The trend shows that the hammer price can be significantly higher than the starting price.

3. Starting Price and Previous Prices:
- The current starting price is 60 euros, which is slightly below the average starting price of 62.67 euros.
- Historically, the hammer price has exceeded the starting price on many occasions, suggesting that there is potential for the hammer price to be considerably higher.

4. Recent Trends: In the most recent auctions, hammer prices have ranged from 80 to 140 euros for coins of similar condition.

Based on these factors, an estimated maximum purchase price for this coin could be in the range of 120 to 140 euros. This is based on the historical hammer prices for coins of similar condition and the interest it may generate at auction.