WHy dont you look at ali turkos wide body gtr going for $15,000 you'd be crazy to throw that away its awesome.
When you look at any car they are not worth buying they all depreciate. Then you take into concideration the massive amount of mods most of us do to them and you can kick yourself when it comes to sale time!
Thankfully skylines hold some value (bar GTRS atm, especially R34s), atm some i.e R32s are appreciating as they are now, unable to be imported.. (year dependent)some of them anyway.
Another example AE86
My tip, buy the car I mentioned or buy the 10g car... wait until someone posts a offtap Rb25 or a crazy rb26 on the forums and buy that.. I think someone sold a real nice one for 6g a while back.. then u got everything u want!