…I have these which were the standard springs taken from my MK1 GTO Twin Turbo as soon as she arrived from Japan.
They are in pretty good condition with only very minimal surface rust in places (and I mean minimal and light!!!) and the car was showing approximately 50k miles when they were taken off.
http://premium1.uploadit.org/CockneyPlayboy//Standard-GTO-springs.jpg
I only took them off because I lowered mine, not because they were faulty in anyway.
OFFERS PLEASE???