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I understand you can't divulge your sources for the current console numbers, however, I would like to know just how accurate your classic console numbers are. Are they just estimates? Or do you get the numbers from the manufacturers old financial reports? I noticed that some of your classic numbers are dead on with Sony or Sega's financial reports, while your total numbers can be as much as 2 million off from other sources I've found.

Are your old console numbers guestimates from secret sources like the current consoles, or did you get the numbers from official sources?