Ed, as I read the user agreement Gunbroker completely absolves themselves of any responsibility. Here's a short quote from it:

"Please keep in mind that GunBroker.com is only a listing service - much like the classified ads in a newspaper. We are in no way affiliated with the sellers that list items here. We are not a court or a law enforcement agency and we cannot force the seller to issue you a refund."

John McCain is my war hero.