Since I've moved to the DC area, I have been on the hunt for some great thrift shops. So far, I haven't had much luck - but I am still a searching. I've found a couple of Goodwills & a Salvation Army. The SA has reasonable prices, the Goodwill not so much so. I'm used to $2 shirts in KY, the same shirts are $5 - $6 here.
I was able to score some pieces while on a shopping spree today. The heart tank is an adorable Cynthia Rowley shirt! It's a large, so it will need to be taken in a bit.