Id go to Wikipedia or use SONY shipments.
For PS1 SONY shipments == Sold ( i doubt their are many still sitting on retail shelves)
For PS2 id use SONY shipments again because VGchartz is missing data... VGC's has PS2 @ 119 million while SONY has PS2 @ 130 million (shipped as of 31st March 08).
VGC's appears to be correct on PSP and PS3 sales though.







