This is the newest DAC from Audio Research. The DAC9 is in the Foundation line. I purchased this new about one year ago from an authorized ARC dealer. I will accept offers and all forms of payment and will only ship CONUS. I've got all original packaging.
Thanks for looking!
From the Audio Research website:

F“ DAC9 digital-to-analog converter decodes most current formats with state-of-the-art vacuum tube technology. Five digital connections - USB, RCA, BNC, AES/EBU, and Toslink - provide connectivity to all of your digital sources. Quad DAC architecture provides a balanced digital signal, wide dynamic range, and decoding resolutions from red book CD up to 384 kHz and native DSD sampling rates. A pair of 6H30 vacuum tubes are the heart of the analog circuit. Both balanced and single-ended connectors are provided for output connectivity. Native-rate upsampling and selectable digital filters allow customization of the digital signal.