Trade a gun to your buddy for a car parts, you could be a dealer.
Give someone a gun for tiling your floor, you could be a dealer.
Loose your job and sell some guns to pay your bills, you could be a dealer.
Buy a gun, don't like it, sell it within 30 days, you could be a dealer.
Sell some guns and loose money, you could be a dealer.
If the AFT says you're a dealer, you're a dealer. Under the new rule you are presumed guilty and must prove your innocence.