FX-CG50 Casio | Distributors, Price Comparison, and Datasheets | Octopart
Casio FX-CG50 3D Function Graphic Calculator SEALED BOX 4549526600814 | eBay
Update: It really does go without saying, the FX-CG50 is a beast of a calculator. But my trusty FX-991EX is still good for a lot of things. They are both good calculators. :
Features of the CASIO FX-CG50 Color Graphing Calculator - YouTube
Eddie's Math and Calculator Blog: Casio fx-CG50 Review (updated 3/2/2018)