Best price I’ve seen. It says for Yoga 720s, but if you look around the web you’ll see folks have gotten it to work with other Lenovo models and with non-Lenovo PCs.
This dock will add a GTX 1050 4GB, plus 2 Display Port ports, 1 HDMI, and 1 gigabit ethernet port, 3 USB ports, and 65 Watt power delivery ( may only work with Lenovo products).
From Lenovo:
Create the most productive and space-saving workstation for your Ultrabook’s with the Lenovo Thunderbolt 3 Graphics Dock. Featuring an integrated NVIDIA GeForce GTX 1050 graphics card, you can have the benefit of the Ultrabook’s sleek portability and still do graphics-heavy work and play. Powered by innovative Intel Thunderbolt 3 technology, enjoy up to 40 Gbps lightning-fast data transfer and experience a definitive 4K video performance with up to three external displays. At the same time, the graphics dock provides stable, reliable, and continuous power to your Ultrabook and mobile device with then Thunderbolt port and always-power-on USB 3.0 port.
Shipping is free.
This link doesn’t show the sale price, but if you add it to your cart it will show the $100 off in the cart.