Mwave offers the iStarUSA Serial ATA 6Gb/s 4-Drive Hot-Swap RAID Cage, model no. BPU-340SATA-BPL, for $74.99 with free shipping. That's the lowest total price we could find by $12. This aluminum SATA hot-swap capable chassis has three 5.25" drive bays, holds up to four 3.5" hard drives, 80mm fan, and supports RAID levels 1 through 5. Deal ends April 14.