I doubt in this country the TF collector market is 1/5th. In the US maybe...
A dedicated toy store like TRU might get items for collectors and charge premiums for them, but Big W, Kmart, Target would only care about the mums and dads buying toys for kids and aren't going to be in the business of grading packaging. They do move damaged floor stock away eventually anyway to those clearance trolleys.
If you want premium packaging shop around and pay more. It's not that hard?
It amuses me to think of future Big W catalogue saying "Transformers DOTM Deluxes. C10 packaging $30 also available in C4 packaging for $10"