Right now Amazon has the Caza Trail Extra Bold Medium Roast Single Serve Cup for Keurig K-cup Brewers, Organic, 52 Count  on sale for $24.00.
Additionally if you scroll down the page there is a coupon for 20% off.
This makes them only $.37 a cup- the stock up price is $.40 so this is a great deal!
Be sure to double check the price before you buy- Amazon prices can change quickly.
And don’t forget you can make your own K-Cups !