Half Price Books

I recently took books to sell to them and was completely shocked at the price they offered to me, my books were from very well known author's and excellent condition, books from Cincinnati, great pictures, and also if you take books in they say something about books from book clubs. I feel as if they rip a person off, going to sell them I can almost guarantee at a huge profit,27 books and offered $6,joking I said right, nope they weren't. I will not take my books there again, sell them at a yard /garage sell, you'll make more money that's for sure!