I'd list mine for 19k cause it looks like how a gtt should, look on Carsales in nsw they all look so crap.
Cars in nsw cost heaps more for every car, maybe supply and demand maybe more enthusiasm maybe there are more buckets that raise price of good ones but that's just how it is. Every Gtr I like is in Vic sadly.
I paid 17.5k on mine last year and put 1500 into servicing straight away and every where I go I get compliments of clean