If you are looking for garage sale quality items without having to get up early to find them, then head over to Bearly Used in Nacogdoches, TX.
The do have a whole store packed full of kids clothes, shoes, and toys. Unfortunately you won't find any real bargains there. Pretty much everything is very used and is of discount store quality. You won't find many of the higher-end brand items.
You will pay a bit more than garage sale prices--but then, you won't have to get up early.