Sold the plane. Now selling headsets.
David Clark DC One-X. Like new. Functions perfectly. Lemo plug. Comes with case. $800…SOLD

Bose A20. Very good condition. Minimally used, Standard GA plugs. $700…SOLD

Bose X. Good condition. New ear seals and mic foam. Standard GA plugs. $300…SOLD

David Clark H10-13.4. Works as designed. Passive. $75…SOLD

AKG headset. Has static noise but otherwise functions. Lemo plug. $50…SOLD
Prices do not include shipping.

I’ll take the Bose A20. PM sent.

(Edited to clarify the A20).

I'll take the Bose X and the DC H10-13.4. PM sent.