Lenovo offers Mobile Pixels Geminos 34" Dual Stacked Monitor for $509.99 (reg $599.99) with free shipping.

Product Description:
A vast, flexible and immersive canvas right above your desktop! Geminos Series is designed ergonomically by stacking monitors one over the other via a linkage system. Whether you're looking for a dual vertical monitor or two horizontal displays aligned in a vertical way, all you need is just a few mouse click. There is no cumbersome actual rotation of the screens anymore.
Ready to have a good screen time? Geminos Series brings much comfort on your eyes, neck and wrist. Sophisticatedly arranged two stacked monitors from top to bottom, it helps to reduce the range of movement of your eyes and neck, as well as less scrolling.

• Less bezel, max concentration
• High functionality meets superb style with an ultrathin bezel design that allows you to see more with less distraction on these 24" screens.
• Personalized workflow
• The Geminos Series, featuring dual vertical monitor, is ideal for media creation and editing tasks as well. Simply spread out the elements of your software to have everything visible. Dual vertical monitors setup helps to save your valuable time from searching and scrolling, so you can focus on the creative part. Keeps your producing and entertaining flow more organized and smoother.
• Free up desk space
• Webcam, speakers, microphone and more are built into the Geminos Series, eliminating the unsightly devices strewn about your desk, offering a clutter-free desk space. Features an advanced front-facing Full HD camera with a 1080p resolution that clearer than before. Moreover, that gives you up to 15-degree tilt rotation control to get the right angle when you need to. Built-in a pair of 3 W speakers and microphone provide clear audio that enhance your sound experience.
• Sit-to-stand flexibility
• The best posture is your next posture. Thanks to the linkage system, the Geminos Series is infinitely adjustable unlike other dual monitor stacked. The top monitor slides up and down, and the bottom monitor pivots in and out to create an angled visual appearance surface. Made switching between sitting and standing through the day without hassle. It's compatible with every posture