Its also interesting that most people on here are probably in the position here where they *could* sell their skylines, and have a bit of a punt on an 1989 vehicle. Not everybody is doing that, so obviously there is a bit of caution out there.
Modified as to unmodified reliability is an interesting one. While on one hand you'd assume a non-modified example would be less "thrashed", less likely to have been doing hard track, drift, or whatever other work in Japan, its not a guarantee.
On the other, much of the time owners of a modified vehicle tend to take more care of the car as its what they put a lot of money into it, getting it tuned, fixing problems, using proper grade oils, etc.
In the end, I think its probably not going to be very long at all before the stopper is put on the 1989 cars by the government. And once that happens, once the remaining ones arrive in Australia -- it will just be a question of condition. Already locally you can pay maybe $28k - $40k for a R32GTR depending on year, modifications, etc. In the end it will be the same for the 1989 cars as potentially 2nd local buyers will be able to get them evaluated, mechanically tested, etc before purchase, however they're more likely to come at the lower end of the scale simply because of year. You definitely can't go on km.