I have a couple of shotguns I wish to sell from the Dallas/ Fort Worth area. Which gun shop would be the best to put them in for consignment?

Predicated on the guns themselves you might check with Paxton Arms or Clay Shooters Supply in the Dallas area. For Ft. Worth, Defender might be a good place to inquire.

Jackson Armory comes up when I google vintage shotguns in Dallas. Has anyone had any experience with them?