In order to sell them, first you must find someone who wants to...

In order to sell them, first you must find someone who wants to buy them. This is, after all, the very purpose the ASX exists (or one of them, somewhat lower down in the list after keeping brokers rich). Since the quoted price is zero it is reasonable to assume there is no-one, so your next best options might be to go door-knocking, or perhaps to take them to your local markets on a Sunday.