I have a usable passenger side strut housing from and E28 with ABS. I got it off ebay a few years back to replace the one that rotted on my car. Turns out the drivers side was bad too so I ended up getting a set so this one is left over. I restored all three at the time, derust, naval jelly, rust converter, and finally VHT Suspension paint. It was rusty but not bad, some pitting but the perch is solid. I cleaned the valley between the perch and housing and filled it in with JB Weld. I do this on all of them to prevent sand and dirt from getting trapped. Much easier to blast them out with the hose and drain properly.
Looking for $125 plus shipping which is what I paid for it, better off going to someone that can use it than sitting on a shelf. Here it is now along with a pic of the project, this one is hanging out on the right.