Meritline offers the Cavalry Retriever Serial ATA 2-Bay USB 3.0 Hard Drive Duplicator / Dock, model no. EN-CAHDD2BU3C-ZB, for $72.99. Coupon code "MLC8X29N" drops it to $54.99. With free shipping, that's $5 under our July mention and the lowest total price we could find by $15. This USB 3.0 drive duplicator / docking station allows you to copy the entire contents of one hard drive to another (including boot drives) without a computer. It supports two 2.5" or 3.5" SATA hard drives or SSD to a Mac or PC.