If you're interested in some more .223, $85 for 200 rounds appears to be a decent deal for these days. I don't shoot it so I'm not positive, but from what I hear that's a good price.

As for Wal-Mart, they've basically become my 7.62x39 supplier for non-steel-core rounds, which is all I can shoot at the range I usually patronize. They're pretty consistent with stock (for now) and have the best price I've found (again, non-steel-core) at $14.47/box. If Fleet Farm ever gets more American Eagle in stock I'll probably clean 'em out, being that they go for $9.50/box last I saw. Interesting that you mention .22, though -- that's one round I've never seen in short supply anywhere around here ("here" being Minnesota).