An up-close look at the components and other materials used in the high-end version of the Xbox 360, which contains a hard drive, found that the materials inside the unit cost Microsoft $470 before assembly. The console sells at retail for $399, meaning a loss of $71 per unit -- and that is just the start.

Other items packaged with the console -- including the power supply, cables, and controllers -- add another $55 to Microsoft's cost, pushing the loss per unit to $126. These estimates include assumptions that Microsoft is getting a discount on many components.