To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially the previous auction prices and the current condition of the coin.

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

2. Previous Auction Prices:
- In previous auctions, coins with a similar condition (70) have had varying hammer prices. For example:
- In 2020, a coin with a condition of 70 was auctioned for 60 euros.
- In 2020, another coin with a condition of 70 was auctioned for 70 euros.
- In 2023, a coin with a condition of 75 was auctioned for 130 euros.
- The average hammer price for coins of this reference is 141.7 euros, but this includes coins in better condition.

3. Starting Price: The current starting price is 60 euros, which is a good starting point.

4. Price Trends: Observing the trends, it seems that coins with a condition of 70 tend to sell between 60 and 70 euros, although there are exceptions where coins in better condition have reached higher prices.

5. Estimation: Given that the condition is 70 and considering the previous hammer prices, a reasonable maximum purchase price could be in the range of 80 to 100 euros. This is based on the fact that, although the condition is not the best, there is potential for the hammer price to exceed the starting price, especially if there is interest in the auction.

Therefore, an estimated maximum purchase price for this coin could be 90 euros.