Diablo 3 Auction House goes offline forever
Right now you're able to click the Auction House button from the main Diablo 3 menu, but you can't bid, buyout or list new auctions in the gold and real-money auction houses.
The service was shut down at approximately 10am GMT. No new auctions can now be made on the auction house, and remaining auctions have been automatically finalised--either going to the highest bidder or returned to the seller.
Players will still be able to claim gold and items from the auction house into their in-game stash until June 24, however.