Newegg has the Logitech LX7 931395-0403 Blue 5 Buttons Tilt Wheel USB or PS/2 RF Wireless Optical 1100 dpi Mouse for $20 with free shipping.
Features:
- The Logitech LX7 features a high-definition 1100 DPI optical engine for ultra-responsive cursor control and features Battery-saving Invisible Light optical technology for reduced power consumption.
- Instantly zoom in and out, and scroll horizontally or vertically – the tilt wheel plus zoom is perfect for viewing digital photos and spreadsheets.
- Convenient forward/back buttons speed up web browsing and paging through large documents.
- The Logitech LX7’s compact wireless mini-receiver eliminates clutter and works with notebooks and desktops with effortless installation.
- The contoured Logitech LX7 is naturally comfortable with soft-touch rubber sides.
- With the automatic standby mode, the battery life can be extended to up to 8 months, or even longer using the on/off button. The indicator light also acts as a low battery warning light for timely
Newegg.com - Logitech LX7 931395-0403 Blue 5 Buttons Tilt Wheel USB or PS/2 RF Wireless Optical 1100 dpi Mouse - Mouse
Logitech LX7 931395-0403 USB or PS/2 RF Wireless Optical 1100 dpi Mouse $20 + FS 
