Here is what the ACCC does to Australian business that attempt to stand up to the American chamber of Commerce

http://paulbarlow.com.au/2016/05/13/

Ebay has deeper pockets than any of the members here who might want to try their luck.

I suggest that ebay has deeper pockets than the ACCC too so perhaps is a clue to why they appear to routinely shirk their duty .. or I may be mistaken and it is simply a case of perhaps the ACCC administration is corrupt to the core and gets paid in brown paper bags in fast food carparks at 2am etc ..

hence class action is perhaps the only course left if anything is to be done about anti competitive practices and rampant greed and monopoly practices by international corporations "investing" in the Australian Nation Building rort ..