I bought a pet hair magnet the other day and I'm actually a little impressed, it gets the woven-in hairs of our American Bulldog out of the couch that even my Dyson can't get! It is kind of hard on the wrist after using it on bigger areas but, no pain no gain! (FYI I paid $14 for it at the pet store and then saw it at Wal Mart for $10....still easier than ordering off the TV though!)
I did buy a "handheld sewing machine" off the TV when I was a kid, and boy did that thing suck! it was more like a "hand-held slightly dangerous knot maker"
I'm tempted to buy that mighty putty stuff that looks like frag putty that's on tv all the time, you know tjhe one where he replaces a link on a chain with it and it holds up? yeah. heh....man....it's a good thing salesmen rarely travel door to door anymore, I'll buy ANYTHING!