Buy.com via eBay offers the Western Digital 2TB Elements USB 3.0 Portable External Hard Drive, model no. WDBU6Y0020BBK-NESN, for $84.99 with free shipping. That's the lowest total price we could find by $13, although we saw it for $10 less in August. It features a data transfer rate of 5Gbps and backwards compatibility with USB 2.0.