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

1. Condition: The coin has a condition of 70 (VF-), indicating that it is in acceptable shape but not of high quality. This will affect the price, as coins in better condition tend to fetch higher prices.

2. Auction History:
- In the past, this coin has been auctioned several times, with hammer prices varying.
- The highest hammer price was 260 euros in 2021, with a condition of 70.
- In other auctions, the hammer prices have been 220 euros (with a condition of 80) and 170 euros (with a condition of 75).

3. Average Hammer Price: The average hammer price for this coin is 190 euros, which provides a good reference.

4. Current Starting Price: The starting price is 60 euros, suggesting that the seller is initially looking for a lower price, but this does not necessarily reflect the true value of the coin.

5. Price Trends: Given that the average starting price in the past has been 237 euros, this indicates potential for an increase in the hammer price.

Based on these factors, an estimated maximum purchase price could be between 200 and 250 euros, considering that the condition is a limiting factor and that the price history shows it has reached up to 260 euros in the past. Therefore, a reasonable maximum price could be approximately 240 euros.