We are moving offices this month and clearing out some vintage PowerMacG5 items that need a good home.
Just posted on ebay two Media100 HDX bundles. Each bundle includes HDX PCI-X card for PowerMacG5, breakout-box & cables, flying cow digital-analog audio converter, release docs & install docs, Media100v10 and Media100v11.5 software with matching activation codes for the included hardware.
Note that one bundle has an 844/X break-out box. It is functionally similar to the HDX box and works with the PCI-X Mac card. I think optibase was short on HDX boxes when we bought our systems and they gave us one 844/X box.
Also, the HDX cards are PCI-X variants for PowerMacG5. These will only work with certain models.