While I enjoy shitting on
Cybsled
's hot takes as much as anyone, in this case he is totally right.
Walmart was the easiest place to find anything high demand when other places were having preorders and midnight lines. Wrath of the Lich King was out of preordered stock on release night everywhere in my city but at 12:01 AM Walmart had an aisle display full of them. Hell, they had four pallets of the last Harry Potter book at the front entrance on release day when every book store (remember those?) in town was on a week long waiting list.