Logitech G300S Optical Gaming Mouse for only $29.98.
Achieve great results with the default configuration straight out of the box. Or, set up one-button triggers for actions that typically require digging into menus. Put push-to-talk communications in easier reach. Temporarily down-shift DPI. Reassign any game command or multi-command macro to any one of nine programmable buttons with optional Logitech Gaming Software (LGS).
Usually sells for $59.95.