I love this bookstore. If you are worried about the "higher" prices, consider the fact that these books are used - any price will be cheaper than you would have paid new!
They do have a very wonderful children's section, and it's divided by new versus used, by ages, and by fiction versus nonfiction - and dominated by a table in the middle that always has incredible kids' books all over it. I saw a boxed set of Little House books here for less than $20 - try that at a regular bookstore!
I don't get a lot out of the literature/sci-fantasy sections, but the non-fiction is unparalleled. They have everything - I rarely make it all the way to the back because the front fascinates me so, but I dimly remember all kinds of sociology, history, biography, language, drama, and art stuff. The front area has Deaf studies, books on etiquette, a great selection of cookbooks and (my favorite) food-lovers' lit, great political books, psychology, self-help, and on and on. It's one of those places where it is very hard for me not to spend money, even when I come in determined to hold back!