I am a proud owner of an r33 Vspec, and have recently got it re-sprayed to the same factory colour.
Now let me tell you about Jap paint.
1. The UV protection is a bit ordinary so expect cars 10+ old to be a bit dull in colour
2. Most Jap cars have rust under the body if they have spent a few winters in Japan, due to snow etc...
3. Most GTR's esp r33's will looking at having seals replaced due to rubber perishing
So in short you aren't going to get a car that isn't 100% perfect, you need to go with what is fixable and easiest to repair.
As for mine I brought it knowing the duco was dull, chipped, scratched and weathered, don't get me wrong for a 10 year old car it held up pretty well. My car was brought to Aust from new, no Rust underneath the car at all. I have had all the seals replaced while the car was being re-sprayed to make sure there was no over spray on rubber seals + the whole car was done not parts of it. I have been busy bringing things back to stock like mirror glass etc, due to shody compliance parts.
But cars like that are rare to come buy and if they are around owners are not willing to part with them easily. All owners on these forums take really good care of there cars and are picky about what is done to do it. Keep looking as really good condition GTR 33's are very hard to come buy that are actually for sale.