I get red wheat from my local feed and grain for $11/50 lb. It is actually organicy grown but not organic certified and its locally grown. it comes in a plain brown paper bag, just because it is cheap dosent mean it is not good quailty. I'm not paying for fancy packaging, long distance transprtation or any marketing.
Only difference between feed grain & "people grain" is that food grade grain is washed 3 times while feed grain is washed twice. Feed store is a great place to stock up! Get the buckets at home depot, mylar bags & oxy absorbers at http://www.shopsimplerliving.com/ & your set. Or if you want to buy them prepacked & food grade go to Sam's Club or Costco online.. some walmarts.. or if that won't do it then http://beprepared.com/
Mitch, here's some info on storing food I posted a couple years ago: http://www.survivalistboards.com/showthread.php?t=39019
Alot has changed since then; ie Costco & Sam's Club now carry prep food. Sam's has the best prices around, and like Ohio said.. some Walmarts are carrying them too.
Mitch, Since you don't list what area of the country you live, it is kinda hard to tell you where to get inexpensive grain. As others have said, Co-ops or feed stores are a good place to look. I have about 3700 lbs. of grain so far, hard white wheat, hard red wheat, oat groats, spelt, barley, rye, triticale, and buckwheat. I get mine from a grain wholesaler about 90 miles from here. Others like Forestbeekeeper get it right from the farmers, as he has told us. You just have to check around, do an internet search for grain sales. Good luck.