short answer: No!
in regards to buying a modified one...thats no better. i bought a huge lemon that was modified. found out the previous owner lied about half the parts that were on it and it ended up dying on me 3 times (clutch, engine, then turbos in that order). about 80% of the time i have had it, its been off the road. its hard to do your research if you havent owned a skyline (or any japanese sports turbo car) before as a lot of it means nothing to you. if back then, i knew what i know now, i wouldnt have bought the gtr. and that is my biggest regret.