Because ioi felt like making them higher.
He is the boss... he can do stuff like that... Don't worry 2k really is not that much in the grand scheme of things. I could be a major retailer decided they were sick of having them take up shelve space so they liquidated them.
Really if you think about most consoles are probably 5-10k off any given week in Japan, and 10-20k in other territories.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut