I have 4 Perlick Sanke couplers for sale. Not sure what it takes to rebuild these things but they'll need a cleaning at the very least. Came with a used beer tower I bought and I have no use for them.
What are they perlick mk-1 model? If anyone wants to know it only cost around 5 bucks to replace all the o rings and gaskets on them. I just rebuilt 2.
Good luck.