Today only, newegg offers the Cavalry 2-Bay USB 2.0 External 3.5" Hard Drive Enclosure, model no. EN-CADB2S-ZB, for $39.99. Coupon code "CAVA614" cuts it to $19.99. With free shipping, that's tied with our March mention and the lowest total price we could find by $17. This enclosure can hold two Serial ATA hard drives, supports JBOD, and features a built-in fan.