Trans Int'l offers the Western Digital 2TB Black Series Serial ATA 6Gb/s 3.5" Internal Hard Drive (pictured), model no. WD2003FZEX, for $138 with free shipping. That's $2 under our January mention and the lowest total price we've seen. (It's a current price low by $9.) It features a 64MB cache and 7200 rpm.

Also available is the Western Digital 3TB Black Series Serial ATA 6Gb/s 3.5" Internal Hard Drive, model no. WD3003FZEX, for $179 with free shipping. That's another price low, this time by $9. It has the same features as above.