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

1. Condition: The coin has a condition rating of 95 (EF+), indicating that it is in very good shape. This generally translates to a higher price compared to coins in lower condition.

2. Previous auction prices:
- In the past, this coin has sold for prices that vary significantly. For example, in 2019 it sold for 400 euros with a condition of 95, and in 2022 it sold for 600 euros also with a condition of 95.
- The average hammer price for this coin is 249.3 euros, providing a benchmark.

3. Current starting price: The starting price is 200 euros, indicating that the seller expects a reasonable price for the coin.

4. Sales trends: The coin has been auctioned 40 times, of which 34 have been sold, indicating good demand.

5. Comparison with previous hammer prices: Given that it has sold for prices above 400 euros in previous auctions, and considering the high condition, it is reasonable to expect that the hammer price in this auction could be similar or even higher.

Taking all these factors into account, an estimated maximum purchase price could be between 500 and 700 euros, given the sales history and the condition of the coin. This would allow for competitive bidding in the auction without exceeding a reasonable limit based on historical data.