Update: The gold and real-money auction houses are now available for use in the Americas, but remain in maintenance for the Europe game region.

Please note that to help reduce load and improve the overall stability of the auction house system, the game may temporarily limit traffic to the auction house during peak gaming hours. This is done automatically, and players may occasionally see a grayed-out auction house button as a result.

If the auction house button is grayed-out, please wait a few minutes and then try again.

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The gold and real-money auction houses for both the Americas and Europe game regions are currently undergoing maintenance to address service-related issues. We don't have an ETA at this time for when maintenance will conclude, but we'll provide an update as soon as we have further details to share.
Edited by Bashiok on 7/2/2012 7:56 PM PDT