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

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. Coins in superior conditions tend to reach higher prices.

2. Starting Price and Average Hammer Price: The starting price is 120 euros, and the average hammer price in previous auctions is 132.6 euros. This suggests that, in general, coins of this reference tend to sell for above their starting price.

3. Sales History: The coin has been auctioned 94 times, of which 90 have been sold. This indicates good demand and consistent interest in this coin.

4. Previous Prices: Looking at the hammer prices of coins with similar conditions (70-75), prices have varied, but many have reached or exceeded 120 euros. For example, in recent auctions, coins with a condition of 70 have reached hammer prices of 140 euros.

5. Recent Trends: In the most recent auctions, hammer prices have shown a trend of increasing, especially for coins in similar conditions.

Based on these factors, an estimated maximum purchase price for this coin could be between 140 and 160 euros. This is due to the good demand, the price history, and the current condition. Therefore, a reasonable maximum purchase price could be 150 euros.