WorkFit-S, Dual Workstation with Worksurface (black) Standing Desk Attachment - Front Clamp This set up retails for $900+ Good used condition. Advanced ergonomics? You got it. The WorkFit-S is our best solution for flexible and comfortable working. This height-adjustable standing desk easily attaches to your desktop—just lift or lower the WorkFit-S and tweak the optional weight settings for no-sweat adjustment. Then individually fine-tune your dual monitor mount and keyboard tray for how you work best. https://www.ergotron.com/en-ca/products/product-details/33-349#?color=black