From 9to5toys.com:

Beach Camera via Buy.com offers the Seagate Expansion 1.5TB Portable USB 2.0 External Hard Drive, model no. STAX1500100, for $109.95. That’s $0.07/GB and the lowest total price we could find by $10. This drive operates at 5400 RPM and has built-in power management. Deal ends June 3.