I own and shoot a number of CZ82 and CZ83 pistols and here are my suggestions.
At some point you will want to replace the Recoil Spring with either a Wolff or a factory CZ replacement, so why not have an extra on hand? The same thing goes for the Magazine Spring(s). I also like having an extra Firing Pin and Spring, as well as an Extractor and Spring just in case. These I would like to have in stock for any pistol I owned and shot regularly.
The only worn out CZ82 and CZ83 parts I have needed to replace thus far were Magazine Catch Components. In my experience that is the one problematic area in this platform. Since there would be no extra shipping cost, along with the mag catch parts I ordered some Assorted Springs, Pins, and Screws from CZUSA stock in case I lost one or a spring broke.
I suppose additional hard parts such as a Firing Pin Stop, Sear, Hammer, and/or Disconnector would be good to have around, especially since you are looking at supporting a pistol no longer in production.
Come to think of it, I guess that I unconsciously stocked up deep on spare parts by buying multiple CZ82s and CZ83s!
