i have been surfing this data set today:
http://www.atf.treas.gov/regulations/27cfr178.html
Principal objective of livelihood and profit. The intent underlying
the sale or disposition of firearms is predominantly one of obtaining
livelihood and pecuniary gain, as opposed to other intents such as
improving or liquidating a personal firearms collection: Provided, That
proof of profit shall not be required as to a person who engages in the
regular and repetitive purchase and disposition of firearms for criminal
purposes or terrorism. For purposes of this part, the term ``terrorism''
means activity, directed against United States persons, which--
(a) Is committed by an individual who is not a national or permanent
resident alien of the United States;
(b) Involves violent acts or acts dangerous to human life which
would be a criminal violation if committed within the jurisdiction of
the United States; and
(c) Is intended--
(1) To intimidate or coerce a civilian population;
(2) To influence the policy of a government by intimidation or
coercion; or
(3) To affect the conduct of a government by assassination or
kidnapping.