OfficeMax offers the Seagate Expansion 3TB USB 2.0 External Hard Drive, model no. STAY3000100, for $139.99. Coupon code “SAVEATHON” cuts it to $111.99. With free shipping, that’s $0.04/GB and the lowest total price we could find by $9. (We saw it for $12 less via pickup 11 days ago, since expired. That same deal also offered it shipped for an extra $6, but that was very brief.) Sales tax is added where applicable. This 3.5″ hard drive runs at 7200 rpm.