Eastern National operates four sales outlets at Gulf Islands National Seashore. Three are located in the Florida District at Fort Pickens Visitor Center; Naval Live Oaks Visitor Center in Gulf Breeze; at Fort Barrancas Visitor Center on board Pensacola Naval Air Station. In the Mississippi District at Davis Bayou Visitor Center in Ocean Springs.
Bookstores sell orientation, history, and natural history books and other merchandise that enhance park visits and future ones. Eastern National, a 501(c)3 cooperating association and eParks.com, its e-commerce website, was formed to support the educational, interpretive and conservation programs of the National Park Service.