Bud, ultimately it is up to you on what your goals are. You can find a lot of decent jedi carded figures, but once you start going for star wars 12 back you will see a drastic decrease in amount available and a huge increase in prices. If you want carded over loose though, I suggest stop with the loose now and flip them to get the carded samples. Again this is up to your goal. I think you can probably put together a carded run of ROTJ cards fairly easily. Might even be able to get the ESB run failr cheap to. Star Wars cards will be a harder set to get togethor and more costly on your pocket book.
I have caviar dreams and McDonald's pockets