Best Buy via eBay offers the Toshiba 500GB Canvio Slim Portable USB 3.0 External Hard Drive, model no. HDTD105XS3D1, for $34.99 with free shipping. That's $0.07/GB, $10 under our mention from two weeks ago, the lowest total price we could find by $25, and one of the least expensive portable USB 3.0 drives we've seen. It runs at 5400 rpm and has an 8MB cache.