CowBoom (Best Buy Company) has the Mad Catz R.A.T. 3 Gaming Mouse 1-Day Sale Priced for $19.99 plus $5 shipping. Sells for around $40 at Amazon. This is new, not preowned.

Take your gaming to the next level with this Mad Catz R.A.T. 3 gaming mouse that features 4 user-definable DPI settings for custom sensitivity and low-friction PTFE feet for simple use on a variety of surfaces.

Features

• 3 Programmable Buttons + 3 position Mode Switch
  
• Right Handed design
• 4 DPI settings (400/900/1800/3500)
• USB Wired
• Works with 64-bit & 32-bit Windows 8, 7, Vista, XP, Mac OS X 10.6.6 or later (requires Intel processor for Mac)