Fostex DAC Headphone Amplifier HP-A8

This is a one-owner item purchased new.
After purchasing this, I also acquired DACs from TEAC and Marantz, but in the end, the one I kept and used the most was this unit, despite it being the oldest, due to its sound quality. It's a shame, but I'm selling it to downsize my audio equipment.
There are no issues with the sound output.
When turning the input selector knob quickly, it does not respond well.
A remote control is included, but it is not functioning properly. A generic power cable and instruction manual are also included.
Software can be downloaded from the manufacturer's website.
It will be shipped in a suitable box.