Maybe some media attention to shed some light on this person's actions, may see Ebay or the correct authorties to take the right action. I am sure Newspapers would be interested, Hearld Sun in Victoria for certain would be interested I know the journalist Fiona Hudson would most likely be interested in hearing your story also channel 7. Fiona Hudson has written a story before about Ebay and she has a twitter account and channel 7 have a page on their website for you to submit stories like this.

As much as I hate when the media go ebay sellers as they do tend to go a little over the top saying we are all the same, at the same time I can not express how disgusted I am with this horrible person's actions, and so many people have been ripped off. This might also make ebay realise that it isn't such a great idea to have bidders private as they have now, because it can be so easily abused. Otherwise I really can't see how this person/people involved are ever going to be stopped. Worse case at least more people will know about her or maybe have bought something from her and decide to take legal action through VCAT and be able to recover some of their money.