buy my car and put an oil cooler on it, strip interior and maybe go stiffer in the suspension... HKS 2835, Brembos, R34 GTR wheels, Cusco diff, swaybars, Bilsteins (too soft for serious track work), Hi Energy bigger/baffled sump, N1 pumps, GTR rods, etc etc
seriously I am taking delivery of a GTR on Fri so I want it gone... 14K and its yours, another 1-2K spent on it and you have yourself a nice package