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

1. Coin Condition: The coin being auctioned has a condition of 95 (S/C-), which indicates that it is in very good shape. This generally translates to a higher price compared to coins with lower conditions.

2. Previous Auction Prices: By observing the hammer prices of coins with similar conditions (95 and 90), we can see that the hammer prices have varied. For example, in a previous auction with a condition of 95, the hammer price was 950 euros.

3. Average Hammer Price: The average hammer price for this particular coin is 306.31 euros, but since the condition of the coin in the current auction is significantly better, we can expect the hammer price to be higher.

4. Starting Price: The starting price is 600 euros, which also indicates that considerable interest in the coin is expected.

5. Market Trends: Given that there has been consistent interest in this coin (46 out of 58 auctions have resulted in sales), this suggests that there is an active market for it.

Taking all these factors into account, an estimated maximum purchase price could be in the range of 900 to 1200 euros, considering that the condition is high and there are precedents for hammer prices in that range for coins of similar condition.

Therefore, an estimated maximum purchase price could be 1000 euros.