I bought this a few months back when my 8 terabyte ran out of space. It was on sale for like $204 shipped. Given how these things fluctuate, I would not be at all surprised if it went on sale for that again at some point in the future. You might set up like a CamelCamelCamel Alert for something like this.
Western Digital 16TB Elements Desktop External Hard Drive, USB 3.0 for plug-and-play storage - Western DigitalBWLG0160HBK-NESN a.co/d/6rA4a6i