$800 is actually a REALLY good deal for a WD desktop hard drive.
Western Digital desktop drives are the toughest to perform internal mechanical repair on. There is an issue with the alignment of the heads being lost when you remove the top lid, and finding it again is extremely troublesome (The higher density the drive, the worse, so new WD desktop drives like the 1TB are nearly impossible right now)
My company charges ~$1200 for WD desktop drives, and that is still considered a good deal.
Moral of the story, back up your data well. Especially if you use WD hard drives. They may perform great, but when they die.....they REALLY die.