Best Buy offers the Western Digital 1TB Mainstream Serial ATA 6Gb/s 3.5" Internal Desktop Hard Drive, model no. WDBH2D0010HNC-NRSN, for $49.99 with free shipping. That's the lowest total price we could find by $10, although we saw it for a buck less in December. It runs at 7200 rpm and features a 64MB cache.