I guess if you put GSX in the description that automatically makes it worth more https://www.ebay.com/itm/NOS-1970-B...448660?hash=item420d727dd4:g:SPYAAOSwkYld4YJM
It looks to me as the cable is NOS,but the other part was added to it after.It does not look NOS.Bruno.
Those are authentic Buick GNX electrons in that there cable, aged direct from pure Copper atoms in that there wire...
When I was selling on Ebay years ago? I listed as Skylark / GS / GSX letting the widest group of potential buyers know what I had for sale! some guys have more than just a GS or skylark & I wanted the biggest range of interested people so often posted this way! it is simply a advertising way of selling parts P.S. that 25 shipping is outrages! I only charged actual shipping costs by weight and distance !This guy is charging labor for his efforts IMO