Bottom less money pit if you know jack shit about skylines.
If you need to ask how much, you probably will struggle, given that petrol will be $2 bucks by the end of the year.
So make sure you have plenty of dosh for support.. but my Skyline was 12 years and VERY reliable, I paid good money for her though.
I sold my R33 GTST and now about to buy a Corolla.