It's probably too late now but next season keep an eye on Craigslist ... farmers in my area regularly post in the "farm+garden" section. I'm in a corn-producing region and farmers typically sell shelled corn for $6 per 40 pound bag. If you're willing to drive to them you can cut out the middleman and get fresh grain for cheap.
I drank fifty pounds of feed-store corn
'till my clothes were ratty and torn