Sears offers the Western Digital Caviar Blue 500GB Serial ATA 6Gb/s 3.5" Internal Hard Drive, model no. WD5000AAKX, for $38. Choose in-store pickup to avoid the $6.99 shipping fee. That's $0.08/GB, $12 under our September mention, and the lowest price we've seen for a 500GB SATA 6Gb/s hard drive without rebate hassles. (It's a current price low for this model by $14.) This drive runs at 7200 rpm and features a 16MB cache.