Best Buy offers the Logitech MK520 Wireless Desktop Keyboard & Mouse Combo, model no. 920-002553, for $29.99. With free shipping, that’s tied with our June mention of a dented box unit and the lowest total price we could find by $2. Sales tax is added where applicable. This mouse and keyboard set features an ergonomic design, 2.4GHz wireless connectivity, and more. It purports up to three years of battery life for the keyboard and one year for the mouse.