Lego Mindstorms nxt 2.0 available. Nearly complete set, including user's guide. *** See update below. Used by our son in high school in a robotics class. Great for learning robotics and coding and teaching associated concepts. Includes touch sensors, color and light sensors. Bluetooth. PC and Mac compatible. Lots of information available online to enhance the learning experience. Software can be downloaded and parts purchased directly from LEGO. See Lego link below for NXT software and NXT firmware.
https://www.lego.com/en-us/themes/mindstorms/downloads
Update 9/11/2020: After having shown this item to a prospective buyer, it came to my attention that there are some missing pieces. Specifically, the rubber tires and 2 of the cables, as well as a few of the blue connector pieces. I don't have a way of knowing exactly what else may be missing. These parts are readily available on Lego's website. Please consider making an offer.