Best Buy offers the Seagate FreeAgent GoFlex 500GB Portable USB 2.0 External Hard Drive, model no. STAA500101, for $49.99 with free shipping ($0.10/GB). That's tied with our mention from last week and the lowest total price we've seen. (It's a current low by $19.) Sales tax is added where applicable. This 2.5" drive features an 8MB cache.