Just pulled these off the car. From what I understand, one of the rear may still be "good" while the other I believe had a stuck adjuster and/or needs a rebuild, never used them. I ran the fronts until I just pulled them off. One of the fronts are stiff/seized, one is completely blown.
These could be a good candidate for a fresh build, or spares for your existing setup when you send them in. Not sure.
Asking $100 OBO plus shipping, ships from 77090.