I have full set of russian rangefinder lens & use them for 20+ years.
- Jupiter 8 never was plastic. It is one of the best normal lens. It is analog for Sonnar 1:2/5 см. Of course the last versions are much more modern, multicouted & so on. But for color shooting the best russian is Industar 61LD.
-Very interesting is Jupiter-3. It is analog for Carl Zeiss Sonnar 1,5/50.
-Very good & rather soft is Jupiter-9 85mm/f2.
-Good but not so interesting Jupiter-11 135mm/f4
-Good & cheap Jupiter-12 35mm/f2,8. It is analog for Carl Zeiss Biogon 2,8/35
-2 wide lens Orion-15 28mm/f6 & Russar 20mm/f5,6 are symmetric scheme lens with rather good correction for the years they were first produced, but now is mostly collection items. Modern Voigtlander is much better with reasonable price.
The tubus (collapsable) Industar-50 (or early Industar-22) I use only for the cameras where it was historically mounted -first FED or Zorkiy.
Never use for full (24x36) frame rangerfinder Industar-69 28mm/2,8 -it is made for half (18x24) frame only!
In general I can say that old soviet rangefinder lens is a good & cheap alternative. The best with year of production before 80-th. Usually first digits of the number is the year. The best are from 50-th -it is the real Carl Zeiss glass from after war reparations.
Photo taken with Jupiter-3 50mm/f1,5