Western Digital offers the factory-refurbished Western Digital My Passport Essential 500GB Portable USB 3.0 External 2.5" Hard Drive in Black, model no. WDBACY5000ABK-NESN, for $44.99. With $2.99 for shipping, that's $0.10/GB, tied with our mention from a month ago, and the lowest total price we could find for a new unit by $22. It features both USB 2.0 and USB 3.0 connectivity. A 6-month Western Digital warranty applies.