Amazon offers the Texas Instruments TI-83 Plus Graphing Calculator for $88.00 with free shipping. Price subject to change.

What makes this deal hot:
You save $61.99 off the retail list price. That's the lowest price we could find. No tax in most states.

What this does & Why you need it:
Features 64 x 96 pixel resolution LCD screen, built-in memory for storage, analysis of up to 10 matrices, handles calculus/engineering/trigonometric/financial functions, backed by 1-year warranty and more.