I've used Lubitels, and they are capable of good results, but are very limiting. If you want cheap try a Chinese Seagull 4A - if they are assembled correctly then they are as sharp as a Yashica or Minolta TLR..
Kiev 60's can have unreliable film transport - I've owned 3 and each one was wonky in one way or another.......
Have you considered a old Zeiss Nettar folder? The ones with f3.5 lenses and 1-200 shutters produce stunning results..
Personally I would look for an old Mamiya C220 - I've seen them sell for under $150, and they produce stunning results - in my opinion as good as a Hasselblad 500 series (of which I've had a couple..)