The only one for Nintendo Wii that I can tell you is officially worth a damn, would be superufo.com or sometimes toysnjoys.com.
I have a trading relationship with the administrators there and they always have the official thing.
Yes one of them is in China. Their prices are usually barely above or right around wholesale. I would not trust anything else except***Deleted by Admin***, or one of the US companies. You can not find a Wii anywhere for less than $240 that is just the way it is. A better solution if selling Nintendo Wii, is to generate traffic for wii buyers by checking the keywords for your product store and submitting your offers & store to all the various shopping directories. You'll be alot more likely to make a good impression that way.