CompUSA.com currently has the Seagate Barracuda 1TB SATA hard drive (model no. ST31000528AS) for $79.99.  This $30 mail-in-rebate offer cuts the price down to only $49.99.  Even after the standard shipping fee of $4.22, this is still the lowest total price we have seen on this hard drive by about $32.  Sales tax applies for residents of Florida, Texas, North Carolina, and Illinois.  The Seagate Barracuda 1TB SATA hard drive has a spindle speed of 7200RPM and a buffer memory of 32MB with a data transfer rate of 3000 Mb/sec. 

Typically in this price range you could expect to find drives like the 80GB Seagate Barracuda, which is now available at eshop.macsales.com for $38.99 with around $5 for shipping.  BuyAAE.com has the Seagate Barracuda 1.5TB hard drive for $99.  Get 2TB of storage space with the Western Digital Caviar Green SATA hard drive, now priced at $139.95 at PCConnectionExpress.com.