One thing I appreciate about home depot's web site: they'll tell you not only whether the item is in stock, but exactly where in a given store it's located
I think for a store as busy and understaffed as Walmart, real inventory gets to be a big guessing game.
My favorite was a handheld coffee grinder. The item was unbranded, and the manual had some brand name manually scratched out with an inkpen everywhere it was mentioned. It's actually a nice coffee grinder, believe it or not.