I'm thinking about purchasing one because I have an upper body injury that limits most other forms of exercise. I've been looking on craigslist and have found some lower end models for as cheap as $200 nearly brand-new. They are by Schwinn and NordicTrack I'm just not sure if I should be looking at a higher end model or if these will do fine for home use. They look much smaller than the gym models but maybe that would be fine. can anyone recommend an elliptical?