There's a tutorial on what to do/look for etc when buying a skyline, but the god dam search button is playing up on me.. Doesn't even work half the time. I think in your case it's best to take someone who knows a bit about cars, even better specifically skylines. I'm with just car insurance and they are pretty great. Had an accident a while ago and they rang me everyday and helped me out, told me what was going on etc, I have my car back now with a few new goodies on it too