FYI.
http://www.bhphotovideo.com/explora/photography/buying-guide/wonderful-world-rolleiflex-tlr-photography-buying-used-rolleiflex-tlr?utm_medium=Email&utm_campaign=Content&utm_source=WeeklyContent%20160116&utm_content=Explora&utm_term=buying-used-rolleiflex-tlr