It would be an intrusting addition to the ECC server if there was a Physical auction house. Any one have any thoughts or ideas about such a thing?
Well, if you can bid from ANYWHERE in ECC, then why waste the time and space making an auction house. Maybe chambers, so the winner and seller can exchange the items without anyone stealing it from them. That would be somewhat usable, but that's just why you tell them to meet you somewhere crazy, like ontop the Nether Gate.
[EDIT] newarrior beat me to it. He built trading rooms. http://www.ecocitycraft.com/forum/viewtopic.php?f=8&t=20169&p=95085#p95085
