ATHQ via Rakuten offers the HP Prime G2 Graphing Calculator for $118. Coupon code "ATH18" drops that to $99.99. With free shipping, that's the lowest price we could find by $20, although most retailers charge at least $139 or more. It features a multi-color 8.9 cm TFT touchscreen display, integrated tool suite, and compatibility with the HP Prime connectivity kit (for wireless connectivity, not included).