Staples offers the Logitech Wireless Desktop MK320 Keyboard and Mouse Combo, model no. 920-002836, for $19.99. Plus, Staples Rewards members qualify for free shipping. (Not a member? It's free to sign up.) That's the lowest total price we could find by $5, although we saw it for a buck less in January. The keyboard features media-centric keys. Deal ends June 6.