This Texas Instruments TI-84 Plus Graphing Calculator, 10-Digit LCD is on sale for $88 (Retail $116).
-Preloaded with software, including Cabri Jr. interactive geometry software
-Up to 10 graphing functions defined, saved, graphed and analyzed at once
-Advanced functions accessed through pull-down display menus
-Horizontal and vertical split screen options
-I/O port for communication with other TI products
Shipping is free.