The CZ-82 and CZ-83 are the same, except for two things:
The slide stop spring setup is different and the CZ-82 was only offered in matte black aka black poly.
The CZ-83 was available in a variety of nickel finishes, matte black, gloss blue, and satin blue. Officially the gloss blue and satin blue are both the same gloss blue. Unofficially CZs quality control is good for quality, but not consistency of finish colors. i.e. - one batch of "gloss" blue guns comes shiny, another comes out satin. The satin blued are probably a mistake that happened to a batch of "gloss" blued. I prefer the satin blue.
The blacks (painted) are all that was ever offered in CZ-82. Relatively few black CZ-83s were imported, so they're probably going to become collectors. Same with nickel 9x18.
copy-pasta'd