Stax SR-Sigma Panoramic Electrostatic Earspeaker + SRD7

Fairly rare normal bias earspeakers in very fine condition and with less that 150 hours use since new.  I'm the original owner and these 'phones have been in dry, protected storage for most of their life,  They produce a lush, wide open, smooth and natural sound with excellent imaging and a large soundstage.  All original, except missing the foam earhole "screening" which never lasted on this model.

What little listening I've done recently has been with the Stax SRM-TIW amp/linestage available in another listing, and the Sigmas/SRM-T1W  really do sound wonderful, in my opinion.  I've done almost no headphone listening lately, so I've put these wonderful earspeakers up for sale.

I'm rating these conservatively as 8/10 for age.  Will sell to the continental 48 states only, and ship (insured) by FedEx or USPS at buyer's expense..  Will accept cashier's check, money order, personal check (shipment after check clears, and PayPal (+3%).  No trades, and lowballers cheerfully ignored.

Thanks for looking.