CowBoom offers the used Microsoft Xbox 360 250GB Limited Edition Halo Reach Slim Console, model no. W3G-00046, for $149.99. Coupon code "X360602515" cuts it to $89.99. With free shipping, that's $60 off and the lowest total price we could find, outside of eBay merchants who charge significantly more. It includes the console, Halo Reach game, and 1-month Xbox Live Gold membership.
Note: No warranty information is provided. This used unit may have dents or scratches and be missing parts or accessories.