As one of its daily deals, Amazon offers the Dell D3100 USB 3.0 Triple Display UltraHD Dock, model no. 5M48M, for $89.99 with free shipping. That's $18 under our August mention, which included a $50 Dell credit, and the lowest outright price we've seen. (It's a current low by $39.) This video dock connects up to three displays to a laptop at once, including one Ultra HD 4K display and two full HD displays. It features three USB 3.0, USB, DisplayPort, two HDMI, Gigabit Ethernet, and 3.5mm audio and microphone ports. A 2-foot USB 3.0 cable and HDMI-DVI adapter are included. Deal ends today.