Hey man. I imported a blue manual 2000 R34 GT earlier this year with an importer in Melbourne. It had 67000kms on the clock and was in really good condition, and I am very happy with it.
When purchasing, be mindful of a few things:
The price of the car (eg, mine was $14000) as it is advertised is generally excluding the actual cost of importing, compliance and whatever the importing dudes charge.
Remember that you cannot personally inspect the car before it arrives, so if you are willing to take a gamble, I think it's worth it (in my case all I did was make a deposit on it, and I could either move ahead or cancel when the car arrived).
I am planning to sell mine when I get off my P's (which is a little under a year) and get an R34 with a bit more go, and I imagine it will do well in terms of resale. I am keeping it stock, and with the Bayside Blue colour and with its condition, I shouldn't be disappointed. I should be able to dish it off to some P-plater.
Hope this helps.