Logitech offers the "dented box" Logitech K320 Wireless Keyboard, model no. 997-000131, for $29.99. Apply coupon code "logi_k321_9711" and it drops to $15.99. With free shipping, that's the lowest total price we could find by $14. Features include 2.4 GHz wireless, up to 3-year battery life, micro-USB reciever, and more. Deal expires September 11.

Of note, this is a dented box item; while the packaging may be dented or scratched, the product itself is new with a full Logitech warranty