API C AuctionHouse.PostItem

Posts an item on the auction house. needsConfirmation = C_AuctionHouse.PostItem(item, duration, quantity [, bid, buyout])

• item:
• duration:
• quantity: - The for items can be bigger than 1, it will not be limited to the given ItemLocation and continue auctioning items from the other slots in your backpack.
• bid: - Either or has to be supplied, or both. Amount in copper, only accepts gold and silver and silently fails for non-zero copper counts.
• buyout:

• needsConfirmation: boolean

• Auctions the non-commodity item in the topleft corner of your default backpack, for 48 hours with a 42 silver buyout.

• Presses the "Create Auction" button, in a macro suitable format which uses a secure template.

/run AuctionHouseFrame.ItemSellFrame.PostButton:Click

• This would brick the Auction House.

• https://www.curseforge.com/wow/addons/magic-button/ - Adds macros for keybinds to buy, post, and cancel on the auction house.