The low price for the game today is very fluid, lots of buyers and lots of sellers discounting their prices.
Since the Nats came to town I can't remember ever seeing the quantity of seats for sale as what is now listed for Friday. I'd expect some real bargains to be available by that afternoon.
Actually, the moment Game 4 ends with the series tied, Game 5 prices will shoot up. A deciding game 5 during prime time Friday night? Good luck getting any bargains. People should buy now.