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

1. Current Condition: The coin has a condition rating of 70 (VF-). This indicates that it is in acceptable condition, 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 from previous auctions for coins with similar conditions (70-80), prices have varied, but there are examples of auctions reaching up to 190 euros for higher conditions.

5. Recent Trends: In the most recent auctions, hammer prices have shown a range that may indicate an increase in demand or in the value of the coin.

Based on these factors, an estimated maximum purchase price could be in the range of 150 to 180 euros. This is because, although the condition is not the highest, the sales history and interest in the coin suggest that it could reach a price above the average hammer price, especially if there is competition in the auction.

Therefore, a reasonable maximum purchase price could be 160 euros.