I got my '95 GTS-T with light mods (air filter, cat back nismo exhaust, nismo suspension, lowered, strut bars, very nice jvc mp3 player, subs, yada yada) for $25.5k only 5mths ago.
My suggestion is to find the car you like first and worry about the price later.
A mate of mine (on here) bought a stock as a rock abbbbsolutely mint '96 for $23k.
But by the time a decent stereo was installed, tints etc it came to more than $25.5k anyway. Choose wisely.
I'm not saying my car is better than his but just look around at the options and certainly dont go for the cheapest car. Also don't go for the 1 with heaps of performance mods. You never know really what quality they are, who put them on and how badly they have been used. Best of spending the money yourself (when you can) and getting it done properly.
You gotta spend money to get quality and their are ALOT of dirty looking skylines around i know that for a fact.
I dunno about you but r32's do absolutely nothing for me, not only that but they are 10yrs old. Sometimes i think of my car being a '95 model and think farrrrk thats getting on now being 7-8yrs old but then i get into my parents vectra or mums 2002 proton and it has just as many options and a heaps better performing car.
Take HEAPS of time looking over the car and testing things. When purchasing my car (private sale) I spent more time taking pics of it with my camera then i did actually seriously looking at it. I just happened to really trust the previous owner and i had never driven something soooo smooth in my life so i was sold.
Spend atleast 30mins driving it and atleast 2-3hrs looking over it. Try steering clear of dealers and look for either private sales or 'importers'.