I own a Keurig machine. When I first bought it, I tried around 60 different K-cups until I found a few I liked a lot. Now I'd like to do the same with regular coffee, because (a) I dislike throwing out plastic k-cups, (b) it's cheaper, and (c) I might just like it better.

I'm not asking for advice in filters, presses or the like. I'm not going to stop using my Keurig. I don't want to buy new equipment, and I'm really not that interested in roasting my own beans or even in grinding them - sorry, I'm just not that into coffee. But that's also where I'm running into difficulty. Where can I buy many kinds of coffee without buying whole pounds at a time?

My ideal: just enough coffee to let me make 2 or 3 cups with it. Fair trade, organic. Pre-ground if possible. Many different types. Reasonable price. Able to buy one flavour in a larger size if I decide I like it. If it helps, I seem to like mild roasts best.

Does anything like this exist?