Where can I get coupons for Texas Instruments TI-84 Plus Silver Edition Graphing Calculator

Amazon has a discount for Texas Instruments TI-84 Plus Silver Edition Graphing Calculator No coupons required Technical Details Graphing calculator handles calculus, engineering, trigonometric, and financial functions USB on-the-go technology for file sharing with other calculators and connecting to PCs 11 apps preloaded Displays graphs and tables on split screen to trace graph while scrolling through table values Backed by 1-year warranty http://Amazon.com Product Description Building on the hugely popular TI-83 Plus, which is perhaps the best-selling calculator of all time, the TI-84 Plus Silver Edition is completely compatible with the TI-83 family. From that well-established platform, this new model adds more speed (a processor that's 2.5 times faster), an enhanced high-contrast display (eight lines by 16 characters), changeable faceplates (silver included), and a suite of 30 Apps. And with nine times more memory than the TI-83 Plus (1.54 MB of RAM, 480 KB Flash ROM), there's plenty of room for even more Apps and your own data storage. It also adds USB on-the-go technology (cable included) that can be used to share files with other calculators or to connect to PCs or optional presentation tools. Thirty Apps are pre-loaded. Popular App titles include Cabri Jr., CBL/CBR, Conic Graphing, Inequality Graphing, Probability Simulations, Science Tools, StudyCards, TimeSpan, Topics in Algebra 1 Chapter 5, Topics in Algebra 1 Chapters 1-4, Transformation Graphing, and more. For students in math and sciences, the TI-84 Plus Silver Edition is a powerful, problem-solving tool with features for storing, graphing, and analyzing up to 10 functions. Plus, it displays graphs and evaluates tables on a split screen, allowing you to trace the graph and scroll through table values simultaneously. Source: http://www.amazon.com/Texas-Instruments-TI-84-Graphing-Calculator/dp/B0001EMM0Q