I've been visiting Walmart Daily... I was able to get all but the Snow Viper, Eel and BAT. I haven't even seen the Vehicles at Walmart, yet - and the only thing for GI Joe there is a lonely Wild Bill hanging on the peg. I almost bought him out of pity, and would have, if I didn't already have two...
** Well, I lucked out after visiting another Walmart early this morning. They must have re-stocked two fresh cases because there was a lot on the one peg they put aside for Joes. I was able to get my BAT, Snow Serpent and Torpedo. It's strange what I find at places and what I don't find at others... this specific Walmart, while out of my way to get to, has always had one or two Joes that I was missing or at least a few left-over "army builder" figures.