Tired of buying gifts that just go back to the store? Maybe that hard to buy for person would like one of the following. Either way, no give backs. (Hey, I didn't say it was a good list.)
Haircuts. Once it's cut, it can't be reattached.
Tattoos. Sure you can get it removed, but you aren't getting your money back. In fact, it'd cost you more.
Garage sale and flea market finds.
Pretty much any spa treatment, especially waxing.
Ice cream cones.