Bestbuy offers Microsoft - Wireless Mobile Mouse 3500 - Loch Ness Gray for $9.99 (orig. $19.99) with free shipping.

Product Description:
Microsoft Wireless Mobile Mouse 3500: Designed for portability, this wireless mouse features BlueTrack technology for use on nearly any surface, a nano transceiver that can be stored in the mouse or in your laptop for convenience and an ambidextrous design for comfortable use.

Thanks Maggie