Instructions
Decide whether you would prefer a new or used copy of Mario Kart Wii. New copies generally are in better condition but more expensive.
Visit electronics retailers such as Best Buy or Fry's Electronics to find new copies of Mario Kart Wii.
Search through the new and used games at game stores such as Gamestop and Game Crazy. You will be able to compare the condition of the new and used copies and decide which you prefer.
Shop online at amazon.com or the websites of other retailers. You can usually get Mario Kart Wii shipped within 24 hours, sometimes at a slightly lower price than at brick-and-mortar stores.
Check half.com or ebay.com for used copies of Mario Kart Wii. These sites feature feedback ratings that provide a guide to seller accountability.