FFXI didn't have a true action house either. You would bid on things and if you passed the threshold set by the seller, you'd successfully buy. It wasn't an ebay style competition of bids over a set time. It was just try to buy and once you met that limit, your new item would be purchased. People would make guesstimate buys based on purchase history. But this game allows you to see the price the seller set. FFXIAH allowed you to see player various data based on history of sells. I wouldn't be surprised to see something like ffxiah in the near future.