I got one at K-mart that must have been mispriced-- it was $15. It even came with an extra battery. It's basically controlled by switching power between two smal pusher propellers. Left only, right only, or both. The controller has two buttons, left and right, and a propeller on switch. you fly with the left and right buttons, and the trick is that you just TAP them. if you hold either button continuously for more than a fraction of a second, you will crash. But once you get that, it's great fun. That was a few months ago, and now I've got the fever. I just mastered my Sky Scooter (excellent next step) and I'm about to build a crazy max by wattage.
JC