I don't know about cheap parts but since you said that, it jarred my memory. One of the wheels mysteriously broke while my daughter and/or boyfriend were using it. I found out like 6 months later when I noticed it was supported on the one side by plywood scraps. Since I don't move it, I never replaced it. Probably will one day....

"A fanatic is someone who can't change his mind and won't change the subject" Churchill