The Black Market Auction House (or "BMAH") is a type of Auction House that gives players access to bid on items normally not sold by NPCs. It has relocated to the west side of the Ring of Blood in northern Nagrand (it was located just southeast of the Tavern in the Mists at the Veiled Stair [63.8, 75.8]).
Where is the black market in Legion?
When first introduced, the Black Market Auction House was located in Veiled Stairs, in Pandaria. In Warlords of Draenor, Madam Goya moved to Nagrand, the Ring of Blood. And because she's such a traveller at heart, the Legion expansion makes no difference.
Where is the black market in Dalaran?
For the Black Market Auction House in the Veiled Stair of Pandaria, see Black Market. The Black Market [61, 15] is located in the far northeastern room of the Underbelly in Dalaran. Rogue supply vendors can be found here.
The Black Market Auction House [54, 15] allows players to bid on special items that are not normally sold by NPCs. Run by Madam Goya, she was originally located at the Black Market, near the Tavern in the Mists on the Veiled Stair of Pandaria.
In Patch 6.0.2, she decided to move her operation to the Ring of Blood on Draenor for more lucrative markets. In Patch 7.0.3, she left Draenor and relocated to Dalaran above the Broken Isles, setting up shop among the lawless elements in the Underbelly.
In Patch 6.2.0, a representative of the black market auction house was introduced, Zhang Yeoh will become a resident of your garrison upon completing N The Missing Manifest. Which comes from [Waterlogged Manifest] rewarded from the shipyard mission Black Market Journal. She allows you to browse the current active auctions, but no bids can be placed.
Instead of buying items from other players like the regular Auction House, items on the Black Market are generated and listed by NPCs. The items are listed for one day only. The items for sale vary from items that were made unobtainable, to rare drops and TCG items. All items are listed infrequently, so it should not be seen as a reliable way to farm rarities.
Bidding works like the regular Auction House. There is no buyout price. The sky (or the gold cap) is the limit when competing with other players for the final bid. With a successful purchase, the item is sent in the mail. Normal Bind on Pickup rules apply, so you must bid on the correct character.
The supply of items is realm-based. Each realm will have different items for sale at any one time and prices are likely to vary wildly from server to server.
If empty, the item window will list "There are no items at this time. Please check back later."
Sure, it'll have some of the best rewards for sale. But that doesn't mean it'll be remotely reliable for one person to gear up quickly. It's the black market, after all. :)Ultimately the system is going to benefit the extremely wealthy and the extremely lucky. But in all likelihood the benefits won't at all be consistent, even for those who can pony up the gold.