NYC firearms must be registered and approved (a bit fuzzy on the Mann Act). You couldn't go out to Olean, NY meet your friend, give him $350, receive a shotgun, go back to New York City, and keep the gun legally in the city. Besides, I'm not sure if private f2f cash transfers are legal in New York State. I know that's what Mr. Bloomberg blames on crime. Hey, if you've seen an explosion of crimes featuring scoped Mosin-Nagant 91/30's, then sorry, I did a bit of bartering at a gun show and didn't didn't feel like getting an FFL and NICS access.