Stubhub got really pricey late this evening, so I missed my chance to get the really cheap tickets for me and my friend. We'll be there though, just had to pay a little more than I had hoped to.
nationals.com/post has $2 and $6 seats for all the remaining games. Good if you don't mind sitting in the 400s, 200s, or outfield 100s or the right/left corners of the field. If you want better seats then not worth it.
Only problem is you have to buy 2+ tickets!