saw this - is this a deal at $47 - I know they are plain used, etc. but any advantage to these vs the $30 Hitachi 2TB SATA drives:
649327-002 HP 2TB 6G SAS 7.2K rpm LFF (3.5-inch) Dual Port Midline HDD
649327-002 HP 2TB 6G SAS 7.2K rpm LFF (3.5-inch) Dual Port Midline HDD