This Yamaha YH1 might not wind up being too expensive since it's USA only and a lot of the big bidders seem to be worldwide.  Don't get in a bidding war with a fellow pirate!

http://www.ebay.com/itm/Yamaha-YH-1-Orthodynamic-Headphones-/110926959888?pt=US_Headphones&hash=item19d3c31510

buggers..i am watching that since it got listed too! MIght fight you for it since its in such nice condition! 

That was actually a YH2, and he cancelled the auction when I wrote him and told him he was advertising the wrong model number.  :-)  Last one for US only went for around 150.  I think they should sell for more like 100-120. 

I'm happy to help with damping if anyone here gets one. 

You're much better off getting a used SRM-717 for $1000. A shame they don't come up more often.

STAX SR-OMEGA looks like it has the original drivers.

Looks good, aside from the insides of the earpads which seem pretty worn, or like they've got mold or gunk all over them.