It used to be that FFLs were easier to get, and you could conduct transactions out of your residence as a part-time activity, and could go to customers homes with your guns to let them pick out what they wanted. Then the BATF tightened the rules considerably.
Yeah, back in the early 1990s I bought a couple of nice surplus military rifles from a guy with a FFL who worked out of his garage at night after work. He no longer can do that because of BATF’s new rules and regulations.