To estimate a maximum purchase price for the coin in question, we can analyze the provided data, especially the previous auction prices and the current condition of the coin.

1. Current Condition: The coin has a condition of 70 (VF-), indicating that it is in an acceptable state, but not of the highest quality.

2. Previous Auction Prices:
- In previous auctions, coins with a similar condition (70) have had auction prices that vary, but some examples are:
- 2022-06-01: Auction price of 360 euros.
- 2022-12-14: Auction price not available, but with condition 70.
- 2023-01-31: Auction price of 380 euros.
- 2023-02-16: Auction price of 380 euros.

3. Average Auction Price: The average auction price for this coin is 301.82 euros, which gives us an idea of the general market value.

4. Starting Price: The starting price is 200 euros, which is a good starting point.

5. Trends: Observing that in recent auctions, the auction price has been in the range of 360 to 380 euros for coins with similar condition, we can infer that interest in this coin may be increasing.

### Estimation of Maximum Purchase Price:
Given that the condition is 70 and considering the previous auction prices, a reasonable maximum purchase price could be in the range of 380 to 400 euros. This is based on the fact that recent auction prices have reached up to 380 euros and that interest in the coin seems to be on the rise.

Estimated Maximum Purchase Price: 400 euros.