As one of its daily deals, Newegg offers the Western Digital 1TB Elements USB 3.0 Portable Hard Drive, model no. WDBUZG0010BBK-EESN, for $49.99 with free shipping. Outside of the mention below, that's the lowest total price we could find by $3, although we saw it for $3 less in July. It provides data speeds up to 5Gb/s. Deal ends today.
A close price: Amazon has it for $50.99 with free shipping.