I have a great deal on a SansDigital TowerRAID TR5UT (Black). The unit was purchased to back up my older SansDigital Tower RAID attached to my MacPro, but I never needed it. It is in the original box with all accessories, etc. You supply your hard drives and you will have a fast RAID storage solution.
$130 o.b.o. plus UPS Ground shipping to US states from my home in the Philadelphia, PA suburbs.
Here is the official description:
The TowerRAID TR5UT+B is a 5-bay hardware RAID 5 storage tower that utilizes high performance USB 3.0 and eSATA interfaces to provide over 200MB/s in performance. The included USB 3.0 is backwards compatible with widely available USB 2.0 ports, which is a convenient feature when both USB 3.0 and eSATA connections are unavailable. With built-in RAID 0, 1, 10, 3, 5 with hot-spare and JBOD, the TR5UT+B provides hardware RAID redundancy protection against hard drive failures. A brand new RAID mode, CLONE or N-Way Mirror, is also introduced to replicate the saved data throughout each installed hard drive. The RAID engine is embedded within the enclosure and performs all RAID parity calculation to reduce CPU utilization from the host PC. RAID controller cards are unnecessary.