Brett, do I understand correctly that with your idea I wouldn't be able to advertise a machine for sale on the forum but I would have to go to the expense of listing it for sale on eBay and then post the eBay link on AP? 

All that will do is raise to cost of machines, I'd be asking for more money to cover the eBay fees which then introduces alot more people to the machine as opposed to us trying to look after each other and keep our machines 'in the family' so to speak at reasonable prices.

The forum is simply a medium for us to communicate with each other and cannot be held accountable for deals turning sour.  If I sell a machine to you after I advertised it here on AP and the deal turned sour, my issue would be with you and not AP.