NewEgg.com has the Seagate Momentus 320GB 2.5″ SATA 3Gbps Laptop Hard Drive, model no ST9320325AS, for $49.99 (59.99 – 10 coupon) with Free Shipping for a limited time. To get discount, use coupon code: EMCMLNL55 at checkout. This 2.5″ 5400 rpm hard drive has a 8MB cache. Coupon expires October 26, 2009.