I believe the margins are quite good on 360 and Wii or at least comparitively so.
Essentially the PS3 is sold at a very low mark up due to its cost to manufacture.
So a store can cut 20 percent off the Xbox and Wii and still make a tiny bit of cash or nearly break even.
Cut 20 percent off PS3 and you are trading at a loss. It does still happen but it will be as a loss leader.







