Sounds like a great way to go to prison... Buying and then reselling guns without FFL...
Yeah, but the BATFE getting a instant background check request for you to buy 13 "Guns" in a day would be a bit of a FLAG...
You still have to fill out a 4473 for 13 guns. True on the if you buy and then decide to sell later it is OK.
Lots of semantics - I am just pointing out that buying a crap load of guns for resell @ profit is illegal and you raise flags if you buy a lot for yourself... Whatever - Enjoy