Hi all. New to the site... Would like to sell my first gun. Confused on one topic. Seems like it's an issue to ask for a bill of sale??? I get that our personal info is sensitive, but at the same time I don't understand how someone would sell a gun to a random stranger without some sort of proof (sold the gun to Bob, this serial #, on this date). Clearly I am missing something - any input is appreciated. Thanks!