17.7 Million xbox 360's have been sold so far, with a massive 8.1 million units of Halo 3 sold, and 1.6million copies of mass effect sold in just 6 weeks.
read more here N4G.com : Latest Xbox 360, Halo 3 Sales Figures Are Astounding
read more here N4G.com : Latest Xbox 360, Halo 3 Sales Figures Are Astounding