Was looking for a decent mouse for a friend under $50 and noticed Mwave have a deal on the G402. It has been about the $40 mark in the past, but $39 is cheaper than anywhere else I can find at the moment. At this price it's great value for a great mouse.
You can also price beat it at Officeworks for extra 5% off as they currently stock it for $71. (I've had no issues price beating Mwave in the past)
Specs:
Logitech G402 Hyperion Fury Gaming Mouse - Worlds Fastest Mouse.
Fusion Hybrid Sensor
8 Programmable Buttons
On-the-fly DPI Switching
32-bit ARM Processor
240-4000 DPI Range
2 Years Warranty
Great mouse.
Picked up a year or so ago and have had no problems.