Best Buy offers the Seagate Barracuda 2TB Serial ATA 6Gb/s Internal Hard Drive, model no. STBD2000101, for $99.99 with free shipping ($0.05/GB). That's the lowest total price we could find by $50 and the least expensive 2TB hard drive we've seen this year. Sales tax is added where applicable. This 7200 rpm hard drive features a 64MB cache.