Logitech offers the "dented box" Logitech K320 Wireless Keyboard, model no. 920-002362, for $19.99. Coupon code "logi_k321_101411 " cuts it to $15.99. Shipping adds $6.21. That's the lowest total price we could find by $8. Features include 2.4GHz wireless, up to 3-year battery life, micro-USB reciever, and more.

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