:) At least it came with a power supply, right?
It had triple, 2N+1, redundant power supplies, and that was most of the cost. My current case only came with the single, standard PS, but it otherwise pretty much the same. So that difference accounts for most of the $300. (Also, the older one also had a 10-bay SCA backplane, whereas the new has a 8-bay SAS.)
SCA = Single Connector Attached, Wide SCSI, but with the power leads incorporated into the data connector so the drive and easily be hotswapped.
SAS = Serial Attached SCSI, the conversion of the SCSI interface from parallel to serial, much like the change in IDE from PATA to SATA, uses the same connectors as SATA (actually SATA drives can be plugged into a SAS system, but not the other way around).
