iSuppli-
the newly revised PS3 is believed to cost Sony $448.73 in materials, manufacturing and box content.
http://en.wikipedia.org/wiki/PlayStation_3
Since the system's launch, production costs have been reduced significantly as a result of phasing out the Emotion Engine chip and falling hardware costs.[77][78] The cost of manufacturing Cell microprocessors has fallen dramatically as a result of moving to the 65 nm production process,[79][78] and Blu-ray diodes have become cheaper to manufacture.[77][80] As of January 2008, each unit costs around $400 to manufacture.[81][82]