LEGO 9731 Mindstorms Vision Command

LEGO set 9731 Mindstorms Vision Command, what is it worth? The current value of 9731 Vision Command is around $140 USD.
LEGO 9731 Vision Command was a 138 piece Mindstorms set released in 2000.

LEGO PART 4142877 CD-Rom, for 9731 Vision Command Windows 98 (English Language)

Lego Mindstorms vision command instruction book 9731 constructopedia

LEGO Mindstorms 9731 Vision Command Review Part 1 (feat. Exploration Mars)

LEGO MINDSTORMS: Vision Command (9731) - New Open Box 42884097318

Builders' Journeys: Okay Y. Looks To 9731 Vision Command

LEGO® Mindstorms Vision Command (RCX Digital Colour Camera) 9731

9371 Vision Command, Brickipedia

LEGO MINDSTORMS: Vision Command (9731) - New Open Box 42884097318

3804 Robotics Invention System 2.0, Brickipedia