Hey all -- I have a set of Progressive springs that came out of my '90 GS. (I purchased Sonics fit to my weight and riding style.)
Previous owner installed them, I have no idea when, I've owned the bike for a year so they're at least older than that. Thoroughly cleaned, no mars or defects whatsoever, and they come with washers and 3/4" spacers that I understand progressive recommends. (When I reallllly looked at those, they seemed slightly off, so you might want to just use them as a reference point.)
My perfect-for-me Sonic Springs are installed and I'm stoked, so I have no use for these, but maybe you do? $50 shipped to anywhere in the U.S. -- international pals, we can work out something reasonable for shipping. If you need them, PM me!
I'm adding one more above-the-spring image so you can actually tell they're progressively wound :D
These guys are sold!! Thanks all.