Newegg has the Sans Digital TR4M+B 4-Bay eSATA RAID 0/1/10/5/JBOD Tower Storage Enclosure w/ 6G PCIe Card (Black) for $140 - $10 off with coupon code EMCYTZT2827
[Exp 1/24] - $30 rebate
[Exp 1/24] = $100
with free shipping. Features four hot-swappable trayless SATA II bays, includes a RR622 dual-port eSATA 6Gb/s PCIe 2.0 x1 RAID controller, and real time hard drive health monitoring.