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 (S/C-), indicating that it is in very good shape. This generally increases its value compared to coins with lower conditions.

2. Previous auction prices: By looking at previous hammer prices, we can see that the coin has reached hammer prices of up to 5000 euros in past auctions, with an average hammer price of 4140 euros.

3. Starting price and estimates: The current starting price is 3000 euros, which is below the average hammer price. This suggests that there is potential for the hammer price to be higher.

4. Auction trends: The coin has been auctioned 13 times, of which 10 have been sold. This indicates a consistent interest in the coin, which may influence the hammer price.

5. Recent auction prices: In the most recent auctions, hammer prices have varied, but they have been in the range of 3200 to 4000 euros for coins of similar condition.

Taking all these factors into account, an estimated maximum purchase price could be around 4500 euros. This price reflects both the condition of the coin and the price trends in previous auctions.