Walmart offers the Microsoft Wireless Desktop 800 Keyboard and Mouse Combo, model no. 2LF-00001, for $19.64. Opt for free in-store pickup via Site-to-Store to avoid the $2.97 shipping charge. That's the lowest total price we could find by $3, although most merchants charge closer to $40. (For further comparison, we saw it for $3 less in May.) This set features a wireless range of up to a 15-foot; the keyboard includes hot keys and the mouse has 1,000 dpi.