I disagree that it will cost you less. Find a motivated seller with a lightly modified car and you will be better off than buying one and spending the coin. I can guarantee that.
We have spent a reasonable amount of money on both my nissans. On the Stagea the mods include HKS GT-RS turbo, PowerFC, FMIC, 3" exhaust, panel airfilter, fuel pump, tuning, clutch, coil packs, electronic boost controller, alarm, tinting front windows, Bilstein shocks, adjustable radius rods, adjustable rear camber arms, 100,000km service and a bunch of other small things.
If we were to sell the car there is no chance of recouping costs from the first day after it rolled out of the workshop.
I would look interstate as well due to the low cost of airfares you will still save money. If you can't find a suitable car ie. colour, factory options etc then importing is still an option that will be open.
Regarding km's on the clock, I have owned my R33 GTS-t for over 9 years and arrived with 57,000km. It has 220,000km now, makes 280rwkw and has good compression still. I seized and idler bearing and stripped the timing belt. Flat bed truck, new timing belt and it is still going.