FirmTek SeriTek 2EN2 Dual-Bay Hot-Swap External Serial ATA Enclosure is in working condition and comes with (2) drive trays, (2) eSATA cables, power supply, (1) drive tray key and (8) drive screws.  Tested with a SeriTek 2SE2-E Serial ATA PCI Express Card in a MacPro running 10.6.8.

Feel free to ask us any questions.  We will be happy to combine shipping with other items.  Thanks for looking.