This is k-rad:

$14 Steadycam: "Steadycams (or camera stabilizers) are attachtments used to capture smooth looking video even when the camera and camera operator are in motion. The camera operator may walk (or even jog), move through tight hallways and doorways, and even climb up and down stairs without shaking the camera. Unfortunately, professional steadycams cost around $1500. Even the cheap 3rd party ones cost $600 . Not exactly a bargain considering many of us use cameras in that price range. So, I decided to make my own version. It turns out, it only costs $14. Not too bad. And I'll show you how to build your own right here (or you may simply buy one from me)... "