Bestbuy offers Microsoft - 1850 Wireless Mobile Optical Mouse - Black for $9.99 (orig. $14.99) with free shipping.

Product Description:
The built-in mini USB transceiver storage on this Microsoft 1850 U7Z-00011 mouse ensures easy portability. Plug-and-play operation enables simple use on Mac, PC and Android systems for versatility.

• LED tracking
  Ensures ease of use on a variety of surfaces.
• Scroll wheel
  For smooth Internet navigation.
• 2-button design
  Provides simple functionality.
• Ambidextrous design
  Enables comfortable use with your left or right hand.
• Built-in mini USB transceiver storage
  Allows easy portability.
• Wireless technology
  Reduces cable clutter on your desk and allows versatile navigation.
• USB 2.0 transceiver interface
  For simple connectivity to your PC, Mac or Android device.