http://empireminecraft.com/forums/community-auctions.42/ Read the first post for rules and what you can auction
Go by this link and you should be fine: http://empireminecraft.com/threads/empire-auction-rules-read-before-posting.42009/
This links to something more helpful. http://empireminecraft.com/threads/empire-auction-rules-read-before-posting.42009/#post-788279