Honestly, I am feeling very apprehensive about buying an used quad, but I am looking for a foundations (or something similar) because I need it to be able to fold up. I'd be thrilled to get a runabout (if I could afford it!) because they're SO well-built. It may be a big investment, but those things seem to hold up extremely well; I'd be a lot less concerned about buying an used runabout than another brand. Go for it!