Why you ask? It is simple. Unless you can buy wii systems online or at a store for retail, then Ebay will have the best deal. In some cases, you can actually buy a wii console for less then retail. Because the supply of Nintendo Wii’s is starting to become more available, Ebay sellers are making it easy and cheaper to buy wii from eBay. So if you have not found where to buy a wii online yet, you may way to take a look at eBay.