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.

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

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Lego Mindstorms 9731 Vision Command/Digital Color camera/RCX