Victor High Rise Collection Dual Monitor Sit-Stand Desk Converter, 28″ by 23″ by 15.5″ – Link

Amazon has this currently marked down to its lowest ever at just $337.11 w/ free shipping.

• Dual monitor sit-stand desk converter allows for correct ergonomic posture while working
• Transforms any sit-down desk into either a sitting or standing desk
• Gas strut design allows adjustable desk and computer monitor height with the twist of a knob