I have an Audeze Deckard pure Class A Headphone Amp for sale in near-mint condition. It has seen light use in a pet-free, smoke-free listening room.
The Deckard is quite powerful at 4w/ch and can drive difficult planar magnetic headphones. It also includes a line-level output so the amplifier section can be bypassed (with a front-panel switch) and it can be used as a bare-bones preamplifier. Finally, it includes a 32-bit 384kHz USB DAC (which I've never used).
This would be perfect as the heart of a high-end desktop system or as a dedicated headphone amp. It's also really attractive, the case and heat-sinks having been designed by the BMW Designworks.
I have the box and packaging and am the original owner. $375.00 firm. Cash or Zelle accepted.
If interested, please email or text member David Bromfield.