As expected, Blizzard has disabled the Diablo III auction houses today, locking down all current pending auctions and preventing new items from being sold going forward. Blizzard announced its intention to shut down both the real-money and virtual in game auction houses late last year.
If you visit the Auction House now, you'll see that it is no longer functional and is accompanied by the following message: "The Auction House is shutting down. You must claim your items from the Completed tab by 6/24. Existing auctions will complete based on the time remaining."
As of today, all active auctions will expire in the normal timeframe. Items in an auction will be either delivered to the current highest bidder or returned to the original seller. Unclaimed gold will also appear (alongside item transactions) in the "completed tab" and players will be able to claim gold and items and from this tab until June 24, according to Blizzard.
"Items and gold not claimed by this date will be consumed by Treasure Goblins, never to be seen again."
Transactions that are successful involving a Battle.net Balance or PayPal will be processed normally and all usual fees will be applied.