As one of its daily deals, Newegg offfers the Rosewill 3.5" Serial ATA USB 3.0 Hard Drive Enclosure, model no. RX356-U-LCD, for $22.99 with free shipping. That's the lowest total price we could find by $7. It's compatible with any 3.5" SATA hard drive and features up to 480Mbps transfer speeds and an LCD transfer speed display. Deal ends today.
Update: Specs corrected.