Best Buy offers the HGST 1TB TravelStar 7K1000 Serial ATA 6Gb/s 2.5" Internal Laptop Hard Drive, model no. 0J22423, for $49.99 with free shipping. (Amazon has it for the same price.) That's tied with our mention from three weeks ago as the lowest total price we've seen. (It's a current low by $20.) It runs at 7200 rpm and features a 32MB cache.