Why do I think 'its a fed' every time I hear something like this? In the words of Randy Weaver, Feds are easy to spot at gun shows. They are the ones trying to convince you to do something illegal.
This was not a fed. it was a former co-worker asking me if I was interested in it. Not his gun, but a friend of his.
I have shown him the error of his ways, and 'splained the consequences of his actions if he continues down this road.