Meritline offers this 2.5" USB External Hard Drive Enclosure for 2.5" SATA HDD Storage for $6.99. Coupon code "MLCK725RNL1" drops it to $3.99. With free shipping, that's the lowest total price we could find. It supports drives up to 1.5TB and features a data transfer rate of up to 480Mbps. Coupon expires after 500 uses.

Expect this item to take two to three weeks to arrive.