Amazon has the Logitech MX 1100 Cordless Laser Mouse for $30 with a $10 MIR and free shipping.
Technical Details:
* Elegantly contoured shape that fits your hand naturally for maximum comfort
* Revolutionary hyper-fast scrolling for flying through documents and Web pages
* Adjustable dpi laser engine (up to 1600 dpi) for customizable precision
* Enhanced 2.4 GHz cordless technology for more robust, reliable performance
* 10 programmable buttons, including a stealth thumb button, for additional control
Amazon.com: Logitech MX 1100 Cordless Laser Mouse: Electronics $10 MIR
Logitech MX 1100 Cordless Laser Mouse $20 AR + FS 
