A few weeks ago, GameStop discounted the Wii U version of Monster Hunter 3 Ultimate to $20. That same price has now been put into effect for the 3DS version. You can place an order online here.
GameStop is also running a deal for the Skylanders Swap Force Wii U bundle. You can pick one up for $249.99. View the product page here. GameStop also has the original Wii U 32GB Deluxe Set for $250, though it can only be found in store.