I'm very happy with a pair of Kiev 2a/4a RF's, the Contax II clones made
at the Arsenal factory in Ukraine. They are cheap (USD 24-30 on EBay), have
a good Zeiss clones lenses (35mm f/2.8, 50 f/1.5 f/2; 85mm f/2; 135mm f/4)
and are robust and reliable.