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 (MS-). 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 in the past is 181.53 euros.
- In previous auctions, hammer prices have varied, but there are examples of sales exceeding 200 euros, especially for coins with a higher condition (such as 80 or more).

3. Starting Price: The starting price is 180 euros, indicating that the seller expects a reasonable price based on sales history.

4. Recent Trends: In the most recent auctions, hammer prices have ranged from 201 to 360 euros, suggesting there is growing interest in this coin.

5. Comparison with Previous Prices: Looking at the hammer prices of coins with a similar condition (70), the price range has been between 112 and 190 euros, but there are also examples of coins with higher conditions that have reached prices of 300 euros or more.

### Estimation of Maximum Purchase Price
Given that the coin's condition is 70 and considering the hammer price history, a reasonable maximum purchase price could be in the range of 220 to 250 euros. This is based on recent interest and price history, as well as the expectation that buyers may be willing to pay a bit more for a coin in good condition.

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