Overstock.com offers the refurbished Western Digital My Book Studio 320GB FireWire 800 / eSATA / USB 2.0 External Hard Drive in Silver, model no. WDH1Q3200N, for $55.20
for shipping ($0.18/GB). That's $32 under the lowest total price we could find for a new, factory-sealed model. This quad-interface drive runs at 7200 rpm and features a 16MB cache.
A 6-month Overstock.com warranty applies.