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 Mindstorms: Vision Command Expansion Set 9731 - Lego toy

Lego Mindstorms 9731 Vision Command/Digital Color camera/RCX

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LEGO Mindstorm RCX Vision Command (Digital Color Camera) - 9731

Lego Mindstorms 9731 Vision Command/Digital Color camera/RCX

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Lego Mindstorms 9731 Vision Command w USB Camera & Instructions

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LEGO 9731 Vision Command (Digital Color Camera) Set Parts Inventory and Instructions - LEGO Reference Guide

Lego Mindstorms: Vision Command Expansion Set 9731 - Lego toy