MacMall offers the Logitech MK270 Wireless Desktop Keyboard and Mouse Combo, model no. 920-004536, for $17.99 with free shipping. That's the lowest total price we could find by $2, although we saw it for $3 less in December. (Most merchants charge $25 or more.) This mouse and keyboard set features 2.4GHz wireless connectivity, eight hot keys, and spill-resistant keyboard. It purports to have up to two years of battery life for the keyboard and one year for the mouse.