Ok, so I did not miss a heads up. That's ridiculous, by the way, not giving us a day's warning.
Is there a link to the prices for single games?
From the email:
How to Purchase Your Postseason Tickets
Log in to your Nationals Access Account
Click the "TICKETS" option at the top of the page
On the new page that opens, navigate to the "Special Offers" tab at the top of the screen
Click "Details" next to "2019 Postseason - NATS PLUS NLCS Presale"
Click "Buy Tickets," then select your seats and proceed to your cart
To purchase tickets to more than one game, you MUST click on “Add Another Event” to add each game into your Shopping Cart during the checkout process
Enter your payment information and check out