Amazon has the Microsoft SideWinder X6 Keyboard for $38.60 with free shipping.
Technical Details:
* Switchable key pad - Flexible design, choose right side or left side confi guration. Switch between standard key pad and macro pad in gaming mode.
* Keyboard keys are red, and key pad and Macro keys are amber in Game mode. Lighting dial adjusts the brightness of the keyboard and key pad.
* Use Cruise Control to continue an action without having to hold down the key or keys assigned to the action.
* Mode switching - Manually toggle the keyboard from standard mode to either of two gaming modes. LEDs show the selected mode.
* Record any sequence of keystrokeseven standard chat messages. Macros are stored on your hard drive and can be easily shared.
Amazon.com: Microsoft SideWinder X6 Keyboard: Electronics
Microsoft SideWinder X6 Keyboard $38 + FS 
