Dell Small Business offers its Dell UltraHD Triple Display Universal Docking Station, model no. D3100, for $119.99. Coupon code "M8TF?18JPQ?8L$" drops it to $107.99. With free shipping, that's the lowest total price we could find by $16. It allows you to connect your laptop to one 4K display and two HD displays and provides three additional USB 3.0 ports, one Gigabit Ethernet port, and 3.5mm headphone and audio outputs. Deal ends December 23.