Usually they do when a pre-order is sold out, but it might be just a few sets per store. Depending on when your store puts them out, they can be gone almost instantly. If your store puts them out right at midnight, they could get snapped up before morning. (I've made a midnight Wal-mart run before for something coming out that day-and there were a bunch of people there doing the same thing with me). It is hard to say because sometimes they will have a bunch instead of a few. Maybe if you ask at your Wal-mart the day before they come out, they can tell you what kind of stock there is. At that point, they usually have them in the back just waiting to set them out when the time comes.