Buy.com offers the Western Digital Elements 2.5TB USB 2.0 External Hard Drive, model no. WDBAAU0025HBK-NESN, for $87.24 with free shipping ($0.03/GB). That’s $3 under our mention from ten days ago and the lowest total price we’ve seen. (It’s also a current price low by $3.) This features WD GreenPower Technology, which claims to reduce energy consumption by 30%.