Nobody believes this when I tell them, so I suspect I’ll have the same response here.
The best K-cups I have found (and I’ve tried lots and lots of them) come from Walmart, their Great Value brand. The Colombian cups are superb, as good as any K-cup I’ve had, and the price is 26 cents per cup when you buy the big box.
Furthermore, if you don’t like going into Walmart, as I don’y, you can mailorder them and get free shipping for any order over $35. Two big boxes are $50 and keep me and my massive addiction supplied for over a month.