Amazon offers Prime members the Microsoft Comfort 5050 Wireless Keyboard and Mouse in Black, model no. PP4-00001, for $24.99 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $9.91.) That's the lowest total price we could find by $40. The keyboard features a built-in palm rest, while the ambidextrous mouse has BlueTrack technology to purportedly work on virtually any surface. Four AAA batteries are required (included).