As one of its daily deals, Best Buy offers the Seagate Momentus 500GB Serial ATA 3Gbp/s 2.5" Internal Notebook Hard Drive, model no. ST905003N1A, for $39.99 with free shipping. That's $10 under our mention from last fall, $20 off list, and the lowest total price we could find. It features an 8MB cache and runs at 5400rpm. Deal ends today.