This variety of k-cup is $5.99 for 12 k-cups. If you do the math, that's $0.50 per k-cup.
Amazon is a bit wordier with how they named this product. They call it "Green Mountain K-Cups Dark Magic, 0.4 ounce, 12 count".
Some additional details about this product:
Need to know more? You can read more about this product on Amazon.
Oh, and here's a bunch of pictures if you've never seen k-cup pods before: