Nissan series one stagea are dirt cheap, all depends if you want the bare minimum like auto rwd.cheapest one on carsales $5900 cut n past link into google works for me :)
http://www.carsales.com.au/all-cars/private/details.aspx?Cr=0&R=9586801&keywords=&trecs=90&__sid=12CE1932D64A&__Ns=pCar_PriceSort_Decimal|0||pCar_RankSort_Int32|1||pCar_Make_String|0||pCar_Model_String|0&__Qpb=true&tsrc=allcarhome&__Nne=15&seot=1&__N=1216%201247%201252%201282%204294963846%204294960181&silo=1011
The more expensive ones are the Dayz edition RS FOUR "S" that have the R33 GTS-4 running gear alsomst like GTR but not or the heavy duty stuff that is GTR running gear such as the Stagea 260 RS
the stagea section on SAU if very informative and the tech guys are very helpful if you need food for thought.
Toyota JZX110 Mark II Blit (omg its a wagon)http://www.youtube.com/watch?v=0onjWOjwYj4 or crown wagon http://www.tradecarview.com/used_car/japan%20car/toyota/crown+station+wagon/6079806/
crown again http://commons.wikimedia.org/wiki/File:1999-2001_Toyota_Crown_Estate_Athlete_Four_rear.jpg a bunch here forsale some come 4WD! http://www.tradecarview.com/used_car/toyota/crown+estate/
some crown specs http://specs.cars-directory.net/toyota/crown_estate/1999_691
crown chassis codes http://www.masiki-denchi.com/hpgen/HPB/entries/65.html
crown model enthusiest site http://crown.niceboard.net/car-concept-styling-f5/toyota-crown-history-t4.htm
its hard some times making the plunge to buy an import but at the end of the day if you need hoses or brakes ect the net is your friend, maybe your wallet not so much if everything to fix the car needs importing but thats what imports are all about having something different.
I love the look of Legnum's but after working for the mitsi dealer for over 6 years and working on FTO's,VR 4's,3000GT,EVO ect ect not a big fan on the reliability of gearboxes and driveline.
so budget is 15k, what are you prepared to spend on general maintenance ? Stagea parts are actually quite cheap for a late 90's vehicle.