You work at a gun shop?
Last time I saw 5.56 was at Walmart. IIRC, it was about $11-$14. It was a single box of Winchester. Someone had mixed it in with a pile of other calibers on the counter, and I just happened to see it. I haven't seen a single box since.
I'm defiantly going to stock up on ammo and reloading components as soon as I can get them for a decent price again.