Can't find if this was posted before.
High resolution laser mouse with soft-touch comfort grip, 4-way scroll wheel and 2 side buttons for web surfing
* Precise 1200 dpi tracking on virtually any surface
* 5 programmable buttons, 4 way scrolling wheel
* Ergonomic design with comfy rubberised side grips
* USB or PS/2 connection
One year warranty
Cheapest I can find.