code: def sell(self, item_id, bid, buy_now, duration=3600, fast=False):
          
          method = 'POST'
          url = 'auctionhouse'
  
          # TODO: auto send to tradepile
          data = {'buyNowPrice': buy_now, 'startingBid': bid, 'duration': duration, 'itemData': {'id': item_id}}
          rc = self.__request__(method, url, data=json.dumps(data), params={'sku_b': self.sku_b})
          if not fast:  # tradeStatus check like webapp do
              self.tradeStatus(rc['id'])
          return rc['id']
docs: Start auction. Returns trade_id.
  
          :params item_id: Item id.
          :params bid: Stard bid.
          :params buy_now: Buy now price.
          :params duration: Auction duration in seconds (Default: 3600).