The one thing I would watch for, if the user is a larger person, or has balance issues, is the width of the belt and the basic stability of the machine as a whole. My YMCA has about six different models, and one has way too narrow of a belt for fat me, I am nervous the entire time that I'm on it that I'm going to go flying off of it.
Terri
I think I'd go to Craigslist or a garage sale and find something cheap (but still functional.)