Mellotronists

I saw one of these in the back warehouse of I.A.M. studios in Irvine 
CA back in 1980-81(where the photo of the M4 I posted in the photos 
section was taken).The studio was run by Skip Konte(Three Dog 
Night,Blues Image) who used Chamberlins with those bands.There was a 
huge stockpile of odd keyboards in storage,including the 200 and a 
Yamaha GX-1(!).The 200 I saw was in MUCH better shape.
  Seems like there must be more of these units out there 
someplace...perhaps in thrift shops or somebody's grandparents house.