He guys ran across and open item @ best buy with missing parts. Antenna, harness, Nav disc and it says RCA cables? Price on it 399? Would it be worth to get and buy all the missing parts? Anything else I would be missing?

Only if you can find all those parts for cheap. They are crazy expensive at http://parts.pioneerelectronics.com/

i am in the chicago burbs, i actually have all the extra parts for the n3. pm me and we can set something up!