I live in the SF Bay Area and there's a guy on Craigslist/Reloading selling an RCBS 4x4 A5 for $100. My money is focused on molds right now. Anyone interested can look the guy up.
I'm not sure if RCBS still makes shell holders for its 4x4 progressive press so in that sense it might be an "orphan". But like all things RCBS I'm guessing it's quite well built.