Fairhaven Camera in Connecticut was where I first discovered screw-mount Leicas (I never heard anyone call them Barnacks then). At the time everyone's have-to-have was Nikon F, so LTM gear was relatively undervalued. I picked up a 35/3.5 Summaron for $20, with another $20 for the 35mm brightline Leica finder; IIIg with 50mm collapsible 'cron was $160. Just within reach for a student.
P.S. Found this: http://www.fultonhistory.com/Process...20-%200450.pdf