I have a used Proshift Rear Derailleur. Mid-90's vintage. Works well! I used it for several years with Deore XT 8 Speed index shifters. It's not perfect, and it has scratches from every day use, so it's not a museum piece. But it's otherwise very clean and in great functional shape. It will provide years of service to the next owner. I only changed it out because I went to a 34 tooth rear cog, and thought that might be a little too much for the cage to handle.
Asking $60!!! plus shipping (Sold!!!)
Asking $60!!! plus shipping (Sold!!!)