Sony Economy Sata 1-3 duplicator and empty HD slot

This would probably be external? using USB connection (which I would also need)for data storage. I already have an empty 750G HD ready to install. If I am looking in the wrong place can someone guide me in the right direction? Hope this isn't a stupid listing, I am still learning. About $265.00 New and less if used in good condition, free S&H, Black if possible. I really don't mind if it is used, just not older than dirt and looking like it :)