Hi leanned,
CameraQuest (that's Stephen Gandy, who sponsors this forum) would be an excellent place to start, particularly the "70s compact RF" pages.
http://www.cameraquest.com/classics.htm
Stephen has probably forgotten more about cameras than most of us will ever know. His writing can be a little overwhelming, but it's worth sticking with it even if at first you don't get it all (I speak from experience).
Also worth checking (and a more accessible read) are the websites by Matt Denton, Erik Fiss, Mike Elek and Karen Nakamura.
Your $200 limit opens up just about anything this side of Leica and Nikon for you. My own favorite RF is a Contax IIa. User-grade bodies can be found way below $200 and you can get Soviet lenses for that starting at about $20. You may want to factor in a CLA (clean, lube, adjust) service, however, which would put you over your limit.
The Japanese RFs of the 70s like the Yashica, Canonet, etc. are great machines but they were built to a price point and it shows. Usually the first thing to go is the black light-sealing foam around the film door. Just turns into goo with age. Easy (but messy) to replace. Also watch out for the battery type. Mercury cells were very common back then but have been banned for a while now.
I would recommend a mid-level German camera to avoid those issues. Voigtländer (Vito series), Agfa, Kodak Retina, Zeiss Contina are plentiful and very affordable. Don't forget to get a light meter, too, if the camera doesn't have one.
As to the Olympus OM recommendations above, those are SLRs. Valid recommendations, I'm sure, but I suppose you did mean RF.
Have fun!