Your question concerns two types of coins.
The rubles are in cu-ni only, but there are unc and proof versions. The uncs were issued at face and are the most common. However, Soviet plastic contained boatloads of softener, so proofs may well look like uncs and can be restored by acetone.
The 5 ruble pieces are all in silver; they did not circulate, either in unc or in proof. I think they were originally sealed in bad plastic, but I see them mostly offered without packaging. Probably, word got around.
Peter