Cheap Used Text Books

Science Textbooks probably loose value faster than any other kind of textbook.  They are also very expensive, partly for the same reason.  Unless you are studying a very old and non-currently studied area of science, science books loose value and are expensive because scientific thought is always changing and new discoveries are being made.

The best way to save money on a science text book is to buy a used one that is the correct edition.  You can find a wide selection of used science textbooks on Ebay.  Make sure the date of publishing is the latest one.  Also make sure you order early and from someone with good feedback.