I'm starting to entertain the idea of selling my Ruger Mark III and S&W 22A privately after learning of what gun dealers will offer me. I have never done a private sale before and have no idea how it works. Both pistols were originally purchased in MA but are currently up in NH. If I do end up selling privately I want to make sure it is a 100% legal sale. How does it work, what requirements must I meet, am I under any liability etc? Thanks for your help.