Talk to your local farmers. If you can find one growing what you want, and you have the packaging to easily get some from him, you can get some great prices. I just picked up 2 tons of hard red winter wheat for $8/bushel. A bushel of wheat is about 60lbs.
I don't know if this will work but I am going to try looking for grains at the local Sprouts store. Who knows, they might have them.
