If you want cheapest your local feed store would probably be your best bet. We're in central La. - Petrus Feed & Seed keeps baby chicks in stock in the spring & I think there's a feed store in Deville who also does so. However, they are all straight run (both girls & boys; you take what you get).
I ordered my original girls from Meyer hatchery in Ohio but I wasn't concerned about price so much as I wanted only pullets of specific breeds and only a small quantity & they have a small order program. So that worked out well for me.
Also try the La. Market Bulletin--you can google a search for their website; it is published every 2 weeks, there is a section for poultry.