One of my favorite thrift shops is the Helping Hand Mission in Cary.
They have "bins" in the back of the store (divided by men's, women's and children's) and it's full of clothes! You get a brown paper bag (provided by the store) and anything you can stuff in the bag, its like $12.
We used to roll the clothes up real tight and stack them around each other.
One time, my god daughter found a Betsy Johnson dress, it was so pretty.
But yeah, lots of Gap clothes, old navy, etc for everyone in the family.
If you dig, you can find some good bargains!