I just bought a couple A20's for the 310 so two of my Bose X's are up for sale. Both work great I just tested them today, leather ear cups and head pads are in good condition. These are non bluetooth and are aircraft powered via the 6 pin LEMO plugs.

1st headset is in great condition, asking $410 plus shipping.
2nd headset is in good condition however one of the plastic ear cup frames is cracked. It still works perfectly and has been like this for over a year and has not gotten worse, pics below. A new frame can be had on Ebay for about $40. I am asking $350 plus shipping for this one.

You can have both for $750 OBO plus shipping.

Thanks,
Sanjeev
snjprs@me.com