ZipZoomfly.com has the OEM Western Digital Caviar GP 1TB Serial ATA 3Gb/s Internal Hard Drive, model no. WD10EADS, for $69.99 (84.99-15 MIR) with Free Shipping for a limited time. The $15 mail-in rebate expires October 31, 2009.
This drive features 32MB cache and runs at 7200 rpm with a reduced power consumption up to 50% compared to other models.