Personally, although it appears to have 59 million Google results in quotes, as opposed to "hard disk"'s 36 million, I refer to the hardware nowadays as "drive" or "disk". The terms "hard drive" and "hard disk" are essentially obsolete leftovers of an era when the "floppy drive" was the main storage medium (and at 8" or 5 1/4" size factors it was truly floppy, e.g. bendable - and eventually, from 3 1/2" size factor onwards it wasn't even floppy but hard instead). Still, a nice name for use as a brand of e.g. digital storage or as a collection of digital media portfolios. If I had to tag a price on it, I'd say it'd max out around the $20k for resellers, or perhaps achieve six figures with a large manufacturer of storage media.