To estimate a maximum purchase price for the coin in question, we can analyze 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 this coin has been 185.61 euros.
- In previous auctions, the hammer price has varied, but it reached up to 261 euros in a 2019 auction with a condition of 90.
- In recent auctions, the hammer price has been 220 euros (2024) and 280 euros (2022) for conditions of 85.

3. Starting Price and Estimated Price:
- The current starting price is 125 euros, with an estimated price of 175 euros. This suggests that there are expectations for the coin to sell for a price higher than the starting price.

4. Market Trends:
- The coin has been auctioned 31 times, with a sell-through rate of 97% (30 out of 31). This indicates a consistent interest in this coin.

Based on these factors, a reasonable maximum purchase price could be in the range of 200 to 250 euros, considering that the current condition is 70 and that higher prices have been reached in the past with better conditions.

Therefore, an estimated maximum purchase price could be approximately 240 euros.