Yep. Whatever the market will bear.
It will be difficult for many "normal" STH to afford the face value. But it will be tempting to buy them up and resell them.
I will probably not end up going to more than a game or two. Taking the family of three will just be out of my price range for more.
I'm counting on a bunch of sth's reselling and driving down prices to nearly face for cheap bastards like me who are willing to last minute it. I can't see them dropping below face since, in that case, I think most sellers would just keep the tickets and go to the game unless they are seriously over extended and just have to cut their losses