Trader Joe's (my local anyway) currently has the Israeli (bigger granules) couscous, 1 lb for $1.99, will easily feed 4-6 adults. Like any grain anytime you buy couscous in bulk you'll save.

I also love kasha (bulgar wheat), but haven't had it since my local grocer stopped carrying my favorite brand of boxed kasha cereal, somehow the bulk bought kasha doesn't measure up. I'll have to check out the Russian delis. A cup of kasha stirred with an egg over really high heat, it wants to hang together from the egg but chop it up so it stays apart, splash a coup of beef bullion into this really, really hot egg-kasha mixture, cover to steam, wait 10 minutes, add pepper to taste, ambrosia!