I'm selling my HeadAmp GS-X mk2-- it's used. I took it in trade. It's in good condition and sounds terrific. I have too many amps! (Not the worst problem).

This is a dual mono amp (each channel has separate circuitry) and a separate power supply.

This is not mint, and it's not priced that way. But if you're looking for a great deal on a terrific sounding amp, there are few solid state amps that can go blow for blow with this one.