I have had good experiences with Gunbroker.com. I have a nearby dealer that doesn't stock many guns (he mostly builds tactical rifles for LE departments), but he's happy to be my transfer FFL. He charges a low transfer fee and the standard TN background check fee. I have also used him as my FFL when buying from Bud's. No problems with either.
Bud's usually has the lowest price (but not always), lower than most Gunbroker.com dealers for new guns, and their price includes free shipping. Galleryofguns.com (actually Davidson's) has a good selection and their sales actually go through local dealers who have already signed up to work with them. Prices vary a ot from dealer to dealer. I've seen $100 difference on the same $600 gun from one dealer to another.
Alan, Tullahoma, TN
Member: GOA, NAGR, NRA, TnFA, USCCA
Beretta Nano, Boberg XR9-S, S&W M&P40