I have one. It was about $35, purchased at the end of the summer on clearance. I don't know the name brand, but I don't think it's a top-notch model.
Mowing with this thing is a real workout, and I agree with those who've said you have to do it regularly -- if your grass gets too high, it's impossible. Realistically, this is an option only for people with small yards. Or much bigger muscles than mine.