Ron, you’re in Georgia, right? Best place would probably be Jack’s Firearms right next to The Fish Hawk. Totally nice guy, totally up-and-up, lots of great guns on the walls and I’m sure he knows how to get less-great guns.
As it happens, I am about to buy my first o-u shotgun myself, from James Buice. He’s got a Beretta 686 Black Onyx (all-blued, field-grade, but very nice). It’s a 12 gauge; hopefully I’ll be overkilling on doves and squirrels this fall then bringing down a few pheasants in Arkansas over the winter.
This gun is making me drool:

Good thing James is a buddy or I’d never be able to afford it.
Zach