J.G.
We have a Logitech. Says on the camera that it's 2 Megapixels. But I think it cost more like $50. Paying less than that, you will get a poor-quality video. One thing I like about mine is that I can zoom in, zoom out, have the camera follow my head so if I swivel around, it'll keep my head in the middle of the camera. There are also filters on there, so I can put a crown on my head or an arrow thru my head and the person on the other side will see it too.
My parents spen $20 on their webcam and have NONE of the options I named above.