From an Aussie perspective with zero local forum affiliations/loyalties:
I use ebay to reach a wide an audience as possible if it is a high end/high priced pinball machine since there are only a limited number of buyers here in Aus with that kind of disposable income to justify regular pinball purchases on that price point.
I have also occasionally used gumtree (similar to craigslist) but being essentially free to list,buy and sell there are a lot of anonymous time wasters that inevitably come as part of transacting on that site.
I use word of mouth if I need to clear some surplus machine stock from imported container loads mainly dealing with a core local group of pinball fans I have established business relationships with over time and who will make the transaction as hassle free as possible and who I know will not bring any baggage into the transaction/negotiation.
For Aussie collectors looking to get into the hobby, I also highly recommend this local facebook group set up by a couple of domestic collectors who can be relied on for integrity and professionalism in the administration of the group without nepotism or commercial interests clouding their judgement.
