This processor/preamplifier from the early 2000s retailed for close to $3,000. Includes onboard tuner, digital optical and coax inputs, and analog preamplifier. Very functional, and one of the last firmware releases. But there’s some kind of short in the RF/LF preamp outputs. (If I press up on the RF plug it goes quiet.) I don’t know how to get to the taps to fix, but if you do, you’ll have a nice unit. Works fine using the headphones, or for use as a tuner using the Tape Out. This one comes in the rare silver aluminum face - much nicer than the black.
I can provide the user manual and schematic in electronic form. Easy pickup in DC. If I can find a box and packing material (recently gave away my stock), shipping could be doable at buyer’s risk and expense. Make offer.