What is the best value condition for this LEGO Mindstorms set?

The loose condition offers the best value at $23, but the CIB option at $81 provides a complete experience.

Is the sealed version of the Robotics Invention System [1.5] available?

Yes, the sealed, new version of the LEGO Mindstorms set is available for $188.

How much does the complete in box version cost?

The complete in box (CIB) version of the Robotics Invention System [1.5] is priced at $81.

Robotics Invention System [1.5] #9747 — LEGO Mindstorms Set Value

Name: Robotics Invention System [1.5] #9747 — LEGO Mindstorms Set Value
Brand: LEGO

LEGO Mindstorms

What the Robotics Invention System [1.5] #9747 LEGO set is worth — loose, complete, and sealed.

Robotics Invention System [1.5] #9747 value — Loose ‏90 ر.س.‏ · $24 · Complete (CIB) ‏303.75 ر.س.‏ · $81 · Sealed (new) ‏705 ر.س.‏ · $188. Prices updated أغسطس 2026.

Theme · LEGO Mindstorms

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Converted from USD at the ECB reference rate — sold comps are US-market sales.

↘ Falling · -10%

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قيمة CIB الشهرية، بناءً على مبيعات فعلية. Chart values in USD.

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بيانات الأسعار مُتحقَّقة من · 1

PriceCharting — Robotics Invention System [1.5] #9747 (LEGO Mindstorms)‏302.36 ر.س.‏ · $80.63

Item details

UPC / EAN: 042884097479
Brand: LEGO
Theme: LEGO Mindstorms
Set number: #9747
Release date: January 1, 1999

Robotics Invention System [1.5] #9747 (LEGO Mindstorms) resale value

A loose Robotics Invention System [1.5] #9747 set runs around $24, a complete copy (all pieces + box + instructions) about $81, and a factory-sealed box commands $188.

What drives the price

Retired sets, completeness (every piece + minifigs + instructions + box), and sealed condition drive LEGO value. Exclusive sets and discontinued themes appreciate the most; minifigs alone can carry significant value.

قيمة إعادة البيع حسب الحالة

Loose: ‏90 ر.س.‏ · $24
Complete (CIB): ‏303.75 ر.س.‏ · $81
Sealed (new): ‏705 ر.س.‏ · $188

Compare Loose vs Complete (CIB) prices →

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Flip math

Profit after eBay fees, against the real sold value:

Sale price

You pay

Shipping

Ads %

Sale price$24.00

eBay fee (13.3%)−$3.18

Fixed order fee−$0.30

Shipping cost−$5.00

Net after fees$15.52

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Price guide

What this actually trades for — sold values by condition vs. what sellers are asking today

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Condition	Value	Based on
Loose	‏90 ر.س.‏ · $24	eBay sold comps
Complete (CIB)	‏303.75 ر.س.‏ · $81	eBay sold comps
Sealed (new)	‏705 ر.س.‏ · $188	eBay sold comps

الأسئلة الشائعة

What is the best value condition for this LEGO Mindstorms set?: The loose condition offers the best value at $23, but the CIB option at $81 provides a complete experience.
Is the sealed version of the Robotics Invention System [1.5] available?: Yes, the sealed, new version of the LEGO Mindstorms set is available for $188.
How much does the complete in box version cost?: The complete in box (CIB) version of the Robotics Invention System [1.5] is priced at $81.