why did they say they wouldnt touch it? because it has wild, crazy illegal mods like a bov and pod? If for that reason then thats a rediculous claim......
here in Perth, spacers are illegal. wheel size can go 2" larger than in diameter from stock. not too sure about width. id imagine 17" wheels on a Skyline would be fine, unless it had some hugely wide wheels on it....
they are certainly not overly expensive to service, relatively easy to do yourself if u can. i guess the only thing with grey imports is panels etc if u have an accident. getting the right panel to fit can be a drama sometimes.
motors are strong and very reliable if looked after especially if your not planning to modify. you may need to spend a little more on some decent oil and of course 98RON fuel, but apart from that its a much better value car than a VS Commodore of the same era.....