newegg offers the refurbished Western Digital 2TB My Book Essential USB 3.0 External Hard Drive, model no. WDBACW0020HBK-NESN, for $88.99 with free shipping ($0.04/GB). That's $6 under our February mention of a new unit and $16 under the lowest total price we could find today for a new one. It features password protection with hardware encryption.

A 90-day warranty applies, although it's unclear who backs it.