Douggie - You need 20 posts to be able to view the Treader section. This rule was implemented a while ago whereby a member would join with one intention - to sell pinballs, but not contribute to the site. It happened a few times, so we simply added a rule to prevent from this from happening. I guess you just need a few more posts and you will see it - it is set within the forum software, so just keep posting !
Hankin was an Australian company that made around seven machines. They were made locally and not many were exported. They are still highly collectible.
You will find that collectors place their machines for sale quite often on this forum. The other alternatives are the Sponsors and other dealers.