The item is that which has been put into the AuctionSellItemButton. That's the slot in the 'create auction' panel. The minBid and buyoutPrice are in copper. However I cant figure out how to go below 1 silver. So putting in '50' or '10' or '1' will always make the auction do '1 silver'. But '102' will make it do '1 silver 2 copper'. runTime may be one of the following: 1, 2, 3 for 12, 24, and 48 hours. Examples: Play with it yourself: As of Patch 4.0, StartAuction() requires a hardware event. This change does not show up in any patch documentation.