As one of its daily deals, Amazon offers Prime members the Logitech K410 Wireless Keyboard, model no. 920-006255, for $19.99 with free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping adds $4.98.) That's tied with our October mention the lowest total price we could find by $20. It features a Logitech Unifying receiver and requires two AA batteries (included). Deal ends today.