ninjatheory:

same with the 360s, they cost $600 to make

no, not true, they cost roughly $400 CDN ($300 USD) to make they also don't have to deal with the shipping costs, Sony actually hired private jets to fly the PS3 here (costing a huge amount of money).  Whereas the 360 is assembled here and shipped throughout America, which leads to cheaper shipping costs, which leads to cheaper consoles for us.