Plant sources

Seed Savers ExchangeSomeYesI haven’t tried the person-to-person exchange but it seems famous in the seed world.
Victory SeedsFewYesLots of varieties, including some ones I haven’t seen elsewhere like their own dwarf tomatoes.
Baker Creek Heirloom SeedsFewYesNo longer purchasing here since I have learned about their providing platforms to racists and extremists. (See information in reviews at link.)
Native Seeds / S.E.A.R.C.H.YesYesNative edible things like tepary beans! Nonprofit and benefits seed preservation! Desert southwest focus. Includes some common garden herbs too like basil that are not part of seed bank, but proceeds go towards their mission.
Prairie MoonYesFewFor the northern Great Plains, but they provide enough info to see what will work here in OK.
Trade Winds FruitFewYesLess common things like Peruvian Ground Cherries!
Stark Bros NurseryNoYesFruit trees and bushes, strawberries
Native American Seed YesFewNative seeds, based in central TX.
Ellison’s Feed, Norman, OKFewYesOnion sets, seed potatoes, assorted seed packets. Friendly and helpful. They pet the dog and she likes that. 🙂