Amazon.com has a Logitech Keyboard Elite Black (USB/PS/2) for $19.39 after $10 rebate with Free Shipping. Excellent Reviews. 

• Ultra-flat, "Zero Degree Tilt" keyboard design for increased comfort
• Nine customizable keys for one-touch access to favorite web sites and applications
• iNav buttons and scroll wheel for keyboard-based web navigation
• Multimedia keys to control audio and video directly from the keyboard

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