Newegg offers the Logitech MK270 Wireless Desktop Keyboard/Mouse Combo, model no. 920-004536, for $19.99. Checkout with MasterPass and apply coupon code "MASTERPASS10" to cut it to $17.99. (Amazon offers it for the same with free shipping for Prime members.) With free shipping, that's tied with our April mention and the lowest total price we could find by $3. 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. Coupon expires June 15.