Bought new but never installed, still in the original box - Kensington Fully Adjustable And Articulating Keyboard Platform With Wrist Rest (K60044US)
Sells for US$446, asking $80
http://www.acedepot.com/kensington-fully-adjustable-articulating-keyboard-platform-with-wrist-rest-k60044us.html
The Fully Adjustable and Articulating Keyboard Platform from Kensington is a great way for setting up a comfortable workstation for your keyboard that allows you to sit or stand while working. In essence, this platform rests on a 9.5" long articulating arm that uses a 23" glide track, the lot of which can be installed under your desk. Once installed, you can pull out the platform from under your desk when needed and push it under when not needed. The platform itself can adjust in height by 12.75" and tilt by 15°. It also can rotate by 360°. In addition, the platform features dual side platforms for fitting a mouse, a calculator, and a small notebook. These platforms can swivel left and right, tilt by 15° and adjust by 2.5" in height. With all of this adjustable flexibility, the platform can easily be installed and used at a regular desk or one that is in a corner position.
The longer 9.5" arm allows you to sit or stand while typing
The keyboard platform adjusts in height up to 12.75", tilts +/-15°, and rotates 360° for use in straight or corner workstation layouts
Dual mouse platforms swivel left and right and have independent tilt and height adjustment
Microfiber cloth wrist rest wicks away moisture and dirt, keeping it soft and comfortable