The Dollar Tree is selling knockoff as seen on tv products. I bought a ped egg type thing (that is a picture of the real one). I hoped it would fair better than the $1 DS screen cleaner I bought from a vending machine. The DS screen cleaner screamed quality item. I felt I was not taking a chance since it was a dollar item.
When I tried it the thing seemed to work well. I wouldn't say $10 well but way more than $1. Somewhere between $2.50 and $5.
They also have knockoff Wonder Hangers, Perfect Fit Button, Aqua Globes, Bumpits, and Smooth Away that I can remember.