Best Buy offers the Western Digital 2TB WD Green Serial ATA 6Gb/s 3.5" Internal Hard Drive, model no. WD20EZRX, for $64.99 with free shipping. That's $5 under our mention from last week and the lowest total price we've seen. (It's also a current low by $15.) This drive purportedly consumes up to 40% less energy than standard mechanical drives. It features a 64MB cache.