Nintendo has announced plans to shave $20 off the price 
of two versions of its best selling video game system – the Nintendo DS. Effective Sept. 12, the DSi will drop from $170 to $150 and the DSi XL will move from $190 to $170.
The move follows price cuts in several other regions, but the timing could raise a few questions. We’ve got three theories as to why Nintendo decided to make the move now.
Chris Morris: Journalist 