Buy.com offers the Western Digital Elements 2.5TB USB 2.0 External Hard Drive, model no. WDBAAU0025HBK-NESN, for $84.99 with free shipping ($0.03/GB). That’s $3 under our mention from three days ago and $35 less than the best total price we’ve seen for a 3TB drive. (It’s also a current price low by $2.) This features WD GreenPower Technology, which claims to reduce energy consumption by 30%.