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 rating of 70 (VF-), indicating that it is in acceptable condition, but not among the best qualities. This can influence the price, as coins in better condition tend to fetch higher prices.

2. Auction History:
- The average hammer price for this coin in the past is 89.22 euros.
- The coin has been auctioned 95 times, of which it has sold 83 times, indicating good demand.
- Previous hammer prices for coins with a similar condition (70) have varied, but there are examples of auctions reaching up to 92 euros.

3. Starting Price and Estimates:
- The current starting price is 60 euros, which is slightly lower than the average hammer price.
- The average starting price of similar coins is 50.46 euros, suggesting that the current starting price is competitive.

4. Recent Trends: In recent auctions, hammer prices have shown a range that can exceed 100 euros for coins in similar conditions, especially if there is interest in the auction.

Based on these factors, an estimated maximum purchase price could be between 90 and 110 euros, considering that interest in the auction and the coin's condition are key factors. Therefore, a reasonable maximum purchase price could be 100 euros.