All Credit goes to Otokumegane who started all this. Check out his Nintendo Tier list
http://gamrconnect.vgchartz.com/thread.php?id=155867
Also Sony List can be found here
http://gamrconnect.vgchartz.com/thread.php?id=155877&page=1#
Series Only
S-Tier 10m+ Sellers
A-Tier 5m+ Sellers
B-Tier 2-5 Sellers
C-Tier 1-2m