(1) OWC Mercury Elite Pro 4TB Ext HD – Mac/PC USB 3/Firewire 800/eSATA – $60
(1) OWC Mercury Elite Pro 2TB Ext HD – Mac/PC USB 3/Firewire 800 – $50
(1) OWC Mercury Elite Pro 2TB Ext HD – Mac/PC USB 2/Firewire 800 & 400/eSATA – $40
We used these for archival and storage. We replaced them with a RAID5 system and these have sat idle for a year. All drives are in good cosmetic condition and all have been formatted securely and have no issues. We have the stackable cradles so you can put several on top of each other can use them in the preferable horizontal configuration. They are made of 100% aluminum and are excellent at keeping heat conducted away from the drives.