Most of the Wii's you can find online will only come bundled because they are so short on stock.
The current going rate for a stock Wii is still $250... if you can find one.
My site, miiwiichat (dot) com, has a method to get a Wii unit from Nintendo for $250. Get a Wii without even leaving your house. Great article.
I seriously doubt anyone can find a Wii unless they are VERY lucky or they wait outside a store for hours (if you can beat the rush).
Ebay seems to be the most chosen method. You'll spend a little more then retail price ($350-$500) but you're not sitting outside in the cold for hours.