Damn, selling out a little more every day, are we?
I suspect the value of the two you have will increase slightly as the show approaches. I'd certainly try to parlay them into something better. Keep in mind though, at some point, I imagine around row 20-25, the face value of the tickets jumped up, therefore, the resale value will as well. I'd try to find out where that point was, so I'd know where the point of diminishing return is.