Usual CDW Outlet caveats--only one usually available, open box or other returned condition but with normal CDW return policy and full manufacturer's warranty.
They've got two that are already down to this price and a third that has one more price drop before it's at this price:
https://www.cdw.com/product/WD-BLACK-6TB-7.2K-SATA-3.5IN-128MB/5205545?pfm=srh
https://www.cdw.com/product/WD-BLACK-6TB-7.2K-SATA-3.5IN-128MB/5206440?pfm=srh
https://www.cdw.com/product/WD-BLACK-6TB-7.2K-SATA-3.5IN-128MB/5216778?pfm=srh
There's also a red 8TB that's going for a dirt cheap:
https://www.cdw.com/product/WD-RED-PRO-8TB-7.2K-SATA-6G-3.5-128M/5204634?pfm=srh
They've got two that are already down to this price and a third that has one more price drop before it's at this price:
https://www.cdw.com/product/WD-BLACK-6TB-7.2K-SATA-3.5IN-128MB/5205545?pfm=srh
https://www.cdw.com/product/WD-BLACK-6TB-7.2K-SATA-3.5IN-128MB/5206440?pfm=srh
https://www.cdw.com/product/WD-BLACK-6TB-7.2K-SATA-3.5IN-128MB/5216778?pfm=srh
There's also a red 8TB that's going for a dirt cheap:
https://www.cdw.com/product/WD-RED-PRO-8TB-7.2K-SATA-6G-3.5-128M/5204634?pfm=srh