There is a 'gun show loophole' that I wouldn't mind closing, but am generally also neutral toward.
I see some private sellers who are at every gun show in the state, all the time, always with a table full of guns, never the same guns, who actively buy and sell at the shows. They are not FFL holders, but 'private individuals selling their collection.'
This seems like an open dodge to me, as it appears to me that they meet the legal definition of a dealer, as they are in the regular business of buying and selling firearms, so it seems like they should have an FFL.
I know they're not an FFL because I've sold two guns and bought one from two of these non-dealer dealers.