newegg offers the Sans Digital TowerRAID 4-Bay eSATA / USB 3.0 Hard Drive Enclosure (pictured), model no. TR4UTBPN, bundled with the HighPoint RocketU PCI-Express 2.0 x1 USB 3.0 Controller Card, model no. 1022A, for $169.99. This $30 mail-in rebate cuts it to $139.99. With free shipping, that's $60 under the lowest total price we could find for a Sans Digital 4-bay enclosure alone elsewhere. The enclosure holds up to four Serial ATA hard drives configured as RAID 0, 1, 3, 5, or 10. The controller card features two USB 3.0 ports, which are also backwards-compatible with previous USB standards. Rebate expires May 8.