When i bought my GTR it had 68K kms on the dail. When i took it to the mechanic he told me that it was in heaps good condition.
The clutch went in 3 weeks due to me trying to launch from 6k but it was a standard clutch which might have been the one that came with it.
Since i've bought it, it's done some tough driving and the engine hasn't blown yet. So not every gtr that says it has low kms might be a lemon and wound back. It might be geniune kms, it might not but either way it's still running good.