mwave offers the ADATA SH02 500GB Portable USB 2.0 External Hard Drive in Black, model no. ASH02-500GU-CBB, for $62.99. With free shipping, that's $0.13/GB and the lowest total price we could find by $7. This 5.71-oz., 2.5" hard drive features 3-dimensional imprint patterns that resist abrasions and fingerprints.