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

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

2. Previous Prices: By looking at previous auction prices for coins with similar conditions, we can see that there is a price trend that varies. For example, in the most recent auction with a condition of 95, the final price was 1300 euros.

3. Starting Price and Average Hammer Price: The current starting price is 600 euros, and the average hammer price in the past has been 315.76 euros. However, since the condition of this coin is above average, it is reasonable to expect that the final hammer price will be higher.

4. Market Trends: The coin has been auctioned 37 times, with a high sales percentage (34 out of 37). This suggests that there is consistent interest in this coin, which may increase its value.

5. Comparison with Similar Condition Prices: In previous auctions, coins with a condition of 95 have reached hammer prices of up to 1300 euros. This can serve as a benchmark.

Taking all these factors into account, an estimated maximum purchase price for this coin could be in the range of 1200 to 1500 euros, considering that the condition is high and there is market interest. However, since the starting price is 600 euros, it is likely that the final hammer price will be closer to the upper end of this range, especially if there is competition among bidders.