$100 at the mothership. 
Do notice that it will not charge your laptop.
On the mothership it lists the usb cable, without specifying its easy to deduce that it will be a usb-a [3.0] cable.used to connect tonthe laptop. Rather than modern usb-3
As previously mentioned this means no power.
Has some good potential, since I have so many monitors available. Looking far enough ahead, I’m a bit concerned for options if/when THIS device dies, after I get so comfortable with the configuration… buying trouble, too far down the road to see.
Here’s a link to the setup manual.
Also, this dock uses DisplayLink software (like many of Dell’s docks)… which does work, but needs to be kept up-to-date, or it starts having random issues. I’ve purchased a few different docks for laptops around the office, and I’ve never been a fan of the ones that use the DisplayLink drivers.
Good (bad, actually) to know…
So i actually use one of these regularly with a Surface Pro 5 (stop laughing!) and IME, if you’re aware of its limitations and not terribly concerned about them, then it’s… decent. Ish. The biggest issue that i run into regularly is that the dock stops communicating with my device, ie the display stops updating, should probably check for a driver update lol, and as a result I’m semi regularly unplugging it from the USB port and then plugging it back in. Other than that, it’s been doing what i want it to do (which is give me an hdmi output and extra USB ports) ever since i installed the drivers and started using it. Since the price (free) was right, i really don’t have much to complain about. It gets the job done and was a lot easier to locate than an old Surface Pro docking station. Plus no need for mini display port adapters. So I’ve got that going for me.