Or you bought it in a store but it was "As seen on TV".
I bought "heal tastic" at Bedbathbeyond those plastic bra strap clips that keep your bra straps from falling down or work well to hide your strap if you have a sleevless shirt etc.
Loved Heal tastic - Made my feet nice and soft if I used it everyday.
Bra strap clip - Just OK. They kind of show under your clothes and poke out in the middle of your back but if you have a bulkier shirt or sweater it wouldnt show.

Re: What have you purchased off of TV and was it worth it?
Diagnosed PCOS & MFI-Success with IUI
Magic Bullet: It's amazing and still works great over 5 years later.
TTC#2=July 2011: Surprise BFP: Chemical Pregnancy