Hmm. I think I paid $2-$2.50 for a 4-oz bag. According to the back of the bag, it is about 40% barley, 40% oats, and 20% wheat. Although, all the "grass" that sprouts looks the same to me.
I've definitely concluded those little trays are a waste of money. I don't have much of a green thumb but throw this stuff in a pot, throw on a little dirt and water, and it sprouts and grows so quickly it seems unnatural. It seems to die back pretty quickly, though. (That's when you throw some more seeds on.)
It's almost keeping Stormy from bothering my other plants. Almost.