<p>You sign up for itracker and based on your zip code it tells you when shipments of whatever your looking for are going to be delivered to local stores that participate. You can get notified by email, text, etc. You will get texts, for instance, that state that “12 wii’s will be arriving at GameStop on US 1 tonight” or something to that effect. You continue to get notices until you sign in and stop them. So if you can’t make it to the first 3, you can go to the 4th one, etc.</p>