Gamestop has the Nintendo Wii U 32GB Deluxe Set on sale right now for $349. You can also use coupon code SAVER to get free shipping! This item is on backorder, but it states on the page that the next shipment is expected in three days, so you shouldn’t have to wait too long.
Walmart has the Nintendo Wii U Solution Bundle selling for $389 shipped! It comes with the console, a game and a remote!
I honestly don’t know how long either of these will be in stock or if other stores will get them in, so you may want to take advantage of one of these while they’re available.
(Thanks Mashup Mom!)