Samsung offers its Smart Dock for Galaxy Note II in White for $99.99. Coupon code "RE157750D" cuts it to $49.99. (You may have to create a Samsung account for the coupon to apply.) With free shipping, that's the lowest total price we could find by $50. Sales tax is added where applicable. It allows you to connect a monitor, external storage device, audio components, or keyboard and mouse to your phone.

Update: It's currently on backorder.