I have no idea how long Crocodile Used Books has been open on Country Club (near Gordon), but I walked in for the first time this morning and was THRILLED. Prices are commensurate with Edward McKay, but Crocodile seems to have a much better selection of children's books. (There were many other sections, but I only had time to nose around that section today.)
I can't wait until to take the oldest there. He is a voracious reader, and he will go nuts. And happily, it will probably cost me less than $10 to let him go nuts.