Bought new for engineering school, never used once. Works perfectly.

Up for sale is a Texas Instruments TI-89 Titanium Graphing Calculator in the color black. This powerful calculator is perfect for anyone in need of advanced mathematical functions. With a generous display size and powered by batteries, this calculator is a must-have for professionals in the business and industrial sectors as well as anyone in need of office equipment. The Texas Instruments TI-89 is a reliable and efficient graphing calculator that will get the job done. This model is perfect for those who need a calculator with a brand they can trust, as well as a model that is specifically designed for graphing purposes. So, whether you're a mathematician, engineer, or just someone who needs a calculator for work, this Texas Instruments TI-89 is the perfect choice.