If they've only been offering unsold seats for rush, I would venture to guess there will be next to nothing available leading up to closing this week.
They have raised the price for all remaining single tickets to premium prices for this week with the exception of two single orchestra seats for tomorrow's performance that are $159 each. They appear to be located in the locations where the rush seats typically have been (rear orchestra.)
Tonya Pinkins: Then we had a "Lot's Wife" last June that was my personal favorite. I'm still trying to get them to let me sing it at some performance where we get to sing an excerpt that's gone.
Tony Kushner: You can sing it at my funeral.