Best Buy offers the refurbished Microsoft Arc Wireless Keyboard in Black, model no. J5D-00001, for $19.99 with free shipping. That's $10 under last month's mention of a new unit (in white) and $13 under the lowest total price we could find for a new one today. Sales tax is added where applicable. This ergonomic USB keyboard features a nano transmitter and operates on two included AAA batteries.

Note that this item is sold "as is" and may not include a warranty of any kind.