I stopped by Big Lots a few days ago and found a few different varieties of Balance bars, going for $3 per box. One box contained 6 bars. This is a darn fine deal. Most bars expired in April. One box though, chocolate mint, expired the day I purchased them, so they are in the freezer waiting for the PCT.
You can also find a huge box of Kashi granola for a good price, and some Bear Naked granola.