I have a set of ae86 T3 rear coilovers. They use a ground control sleeve/lockring etc, eibach 6kg spring, using a KYB short stroke AGX insert - 8 way adjustable. Can go almost stock ride height or can slam the car onto the ground.
They were on my car for one day. - Brand new.
From T3 usa they are about 850aud, and turn out to be about 1000 delivered.
Im looking for $800 - In brisbane willing to ship interstate.