Western Digital offers its Western Digital My Passport 1TB USB 3.0 External Hard Drive, model no. WDBJBS0010BSL-NESN, for an in-cart price of $44.99 with free shipping. That's the lowest total price we could find by $14. It features up to 5Gb/s transfer rates at Time Machine compatibility. A 3-year Western Digital warranty applies.
Of note, it's designed for Macs, however it's also compatible with Windows.