Founded in 1997, BookFinder.com has become a leading book price comparison site:
Find and compare hundreds of millions of new books, used books, rare books and out of print books from over 100,000 booksellers and 60+ websites worldwide.
Algebra & Trigonometry:
Intended for courses in College Algebra, Algebra and Trigonometry, Precalculus, and Trigonometry, which require student use of a graphing calculator. [via]