Here is a true rarity although I suspect it's not a real Crayford.

https://providence.craigslist.org/cto/d/1978-mercedes-280-ce-st/6416709701.html

Thinking about joining the club for $32 USD. There is apparently one (1) registered with the club which covers the whole world. Read a few other posts on other sites .... one claim is that there were 200 made ... 20 made .... 12 made per this CL poster ...