GT-4 is mainly a coupe but there are some rare cases of a 4door version available.
I did a quick search not sure which state you are in but found some for cheaper with similar spec on drive.com.au... also on a side note whilst i was there, there is a dealer selling R34 GTT Coupes in Auto/Manual from $22*** now... man i paid that for my sedan like 8 months ago!
http://www.drive.com.au/used-cars/NISSAN/S...mp;d=0&nv=1 (Non Dealer)
http://www.drive.com.au/used-cars/NISSAN/S...mp;d=0&nv=1 (Dealer)
EDIT: just noticed the number plates, these are in Sydney but gives you something to compare with i am sure you can find a good value one in good nick for around the $19k from a dealer in your area, if not I would wait untill you find one in that range as the value is dropping quickly now and not matter how many mods you do to the car or have on it, it will only yield a slightly higher value when reselling if that concerns you at all, some people like to not waste a heap of cash and others don't worry. I personally bought mine stock and am investing cash into it so it will loose alot but then stockers are mostly but not in all cases less "trashed" as you say - just my opinion.