Note, you may be able to save an additional $5. Refer to this thread for more information.
Walmart.com also has Mario Kart 8 (Nintendo Wii U) on sale for $48.80 with free shipping.
Deal Editor's Note: Don't forget about your free game when you register the game with Club Nintendo! From now until July 31st, you will receive a free download code for one of the following games when you register Mario Kart 8:
- New Super Mario Brothers U
- Pikmin 3
- The Legend of Zelda: The Wind Waker HD
- Wii Party