A few key details would determine if it's worth it for you to go any further. In what quantities? is there a limit to the size you are looking for ?
( a few gig to + terabytes) mechanical and SSD ? SATA and or PATA, SAS, SCSI etc ? Once we have these answers we can advise you further.
At my current capacity I could not fill a truck in a year - but that's currently ..... Do tell