I'm guessing store by store basis. When I used to stop by my local Target on a regular basis, every once and a while you would find a boat load of clearance games like they were getting ready to bring in a bunch of new stock. When this would happen, I would visit the other nearby Targets to see if they were doing the same. Nearly every time you would find that each store put different games on clearance, and if they did pick the same game, the clearance price was almost always different between stores. Oddly enough, one store always seemed to lower their prices more than the others, so that was always the one I would check first.