Quote Originally Posted by roto13-ness
Or because they're ridiculously poor quality, as far as hardware goes.
And overpriced.

I'd recommend also avoiding anything made by Creative. I have one (Muvo^2) and I haven't had the best experience with the company, though the MP3 player itself still works pretty well now over a year after I bought it. But it took me a while to get one that wasn't defective. And the one I have is still a bit crazy at times.