Everyone seems to be offering one of the two Nintendo DSi bundles--with either Brain Age or Mario--for $170 with some sort of gift card. Amazon has decided to one-up rivals with its pre-Black Friday sale, though, and is currently offering the Nintendo DSi bundle for $155, shipped. The DSi, the third generation of the Nintendo DS line, features two large screens (one touchscreen), two cameras, and Wi-Fi. The metallic-blue Mario bundle comes packed with Mario Calculator, Mario Clock, Wario Ware: Snapped, Mario vs. Donkey Kong: Minis March Again, and Dr. Mario Express, while the white Brain Age bundle comes with Brain Age Express: Sudoku, Brain Age Express: Arts & Letters, Brain Age Express: Math, Photo Clock, and Clubhouse Games Express: Card Classics. Both bundles are available for preorder on Amazon now.