I’m selling my SHA900. The DAC, or USB input, is defective. There are audio drop-outs when listening to any hi-res material/source files. Redbook, or 16/44, playback is unaffected and plays without incident, but anything at 24/48, 24/88, 24/96, etc. suffers from audio dropouts. I’d been using the SHA900 exclusively as an AMP via its line input and planned to ask Shure to provide out-of-warranty service for the DAC input in the near future, but I haven't used it much lately.
All other functions—line input, ADC stage, OLED— are working. There is some wear throughout the body of the device and the screen has some scratching. The device has 12 battery cycles. It is running the latest firmware. This will not include retail packaging or contents, only the Shure SHA900, Shure Lightning to microUSB cable, USB-A to microUSB cable, and a few inexpensive interconnect cables.