Dell Small Business offers the Buffalo MiniStation Stealth 500GB USB 2.0 Portable External Hard Drive in Black, model no. HD-PCT500U2/B, for $59.99 with free shipping ($0.x/GB). That's $15 below our May mention and the lowest total price we could find now by $10, although we saw this model for $10 less in September. Sales tax is added where applicable. This portable hard drive is Mac and Windows compatible.