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

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

2. Starting Price and Average Hammer Price: The starting price is 125 euros, and the average hammer price in previous auctions is 194.8 euros. This suggests that, in general, coins of this reference tend to sell for a price higher than the starting price.

3. Sales History: The coin has been auctioned 63 times, of which 60 have been sold. This indicates high demand and good interest in the coin.

4. Previous Prices: Looking at previous hammer prices for coins with similar conditions (70 and 80), the hammer prices have varied, but there are examples where prices have reached 140 to 170 euros in similar conditions.

5. Recent Trends: In the most recent auctions, hammer prices have shown an increase, especially for coins in better conditions. However, given that the condition of this coin is 70, it is reasonable not to expect an extremely high hammer price.

Based on these factors, an estimated maximum purchase price could be between 180 and 220 euros. This is based on the average hammer price and the price history of coins with similar conditions.

Therefore, a reasonable maximum purchase price could be 200 euros.