I was in Fiji between the 14th & 28th of September in 1974 & there were heaps of Datsuns back then. I got a rental car that was supposed to be a new 120Y, but when it showed up, it was a 1200 two door sedan. I was disapointed at first, but only up to the moment the clutch engaged & I loved it after that.

They seemed to scrap cars only when the rust reached the door handles & it didn't seem to take all that long to get to that level as I didn't notice very many cars that were over 10-12 years old, however all of my time there was spent on the coastal fringe, so this would be a big factor