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

1. Current Condition: The coin has a condition of 70 (VF-). This is an important factor, as coins in better condition tend to reach higher prices.

2. Auction History:
- The average hammer price for similar coins has been 76 euros.
- In previous auctions, hammer prices for coins with similar conditions (70) have varied, but there are examples of sales reaching up to 130 euros (in the case of a condition of 80).

3. Starting Price: The starting price is 30 euros, indicating that the seller expects a low minimum price, but this does not necessarily reflect the actual value of the coin.

4. Price Trends: Looking at previous hammer prices, it seems that coins with a condition of 70 have had sales ranging between 30 and 85 euros, with some exceptional cases exceeding 100 euros.

Based on this data, an estimated maximum purchase price for this coin could be around 85-100 euros, considering that the condition is good and there is a price history that supports this estimate. However, it is important to keep in mind that the market can vary and that demand at the time of the auction will also influence the final price.