newegg offers the 5-oz. Samsung S2 500GB Portable USB 3.0 External Hard Drive
in Piano Black, model no. HX-MT050DA/G2, for $49.99
with free shipping
($0.10/GB). That's the lowest total price we could find by $20. This external 2.5" hard drive features data transfer speeds of up to 4.8Gbps.