Always keep some un-registered guns, you know the ones you traded your buddy for so neither one of you would have registered guns. They might be coming for them, but here in Nevada, and the wild west in general, they'll never get them all. If you know they're coming, a hole in the ground will do., So far, you can buy and sell guns private party and the seller doesn't have to prove he sold it to someone, at least to my knowledge, so you can always say you sold them.