Empirical Audio Overdrive® SE USB DAC/PreDAC (and Short Block USB Filter)

Bought one of these a LONG time ago and I think it made a big difference in DAC performance attached to a PC. For some reason, it does not work with my new Hifiman DAC/AMP. It only works on DACs that do not need the 5v usb signal for power.

Before I post ad to sell, does anyone think there would be ANY interest in this?

Thanks in Advance