What is the best deal for this LEGO Mindstorms kit?

The best value depends on your needs; loose is $29, but sealed new is $136.

Can I buy this kit in a complete condition?

Yes, the complete (CIB) version is available for $130.

Is the sealed version the most valuable?

Yes, the sealed (new) condition is listed at $136.

Dark Side Developer Kit #9754 — LEGO Mindstorms Set Value

Name: Dark Side Developer Kit #9754 — LEGO Mindstorms Set Value
Brand: LEGO

LEGO Mindstorms

What the Dark Side Developer Kit #9754 LEGO set is worth — loose, complete, and sealed.

Dark Side Developer Kit #9754 value — Loose ‏112.5 ر.س.‏ · $30 · Complete (CIB) ‏487.5 ر.س.‏ · $130 · Sealed (new) ‏528.75 ر.س.‏ · $141. Prices updated أغسطس 2026.

Theme · LEGO Mindstorms

Live on eBay now

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

↘ Falling · -36%

See current eBay listings

Selling on eBay right now · by condition

New

$153

7 listings asking

Used

$70

13 listings asking

Median of current eBay asking prices — live, not sold data.

سجل أسعار النسخة الكاملة بالعلبة

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

See the actual sold listings on eBay ↗

Live on eBay right now

JunkPal AI· resale insightanalyzing sold comps…

▍

بيانات الأسعار مُتحقَّقة من · 1

PriceCharting — Dark Side Developer Kit #9754 (LEGO Mindstorms)‏487.5 ر.س.‏ · $130

Item details

UPC / EAN: 042884097547
Brand: LEGO
Theme: LEGO Mindstorms
Set number: #9754
Release date: January 1, 2000

Dark Side Developer Kit #9754 (LEGO Mindstorms) resale value

A loose Dark Side Developer Kit #9754 set runs around $30, a complete copy (all pieces + box + instructions) about $130, and a factory-sealed box commands $141.

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: ‏112.5 ر.س.‏ · $30
Complete (CIB): ‏487.5 ر.س.‏ · $130
Sealed (new): ‏528.75 ر.س.‏ · $141

Compare Loose vs Complete (CIB) prices →

See current eBay listings

أين تشتري

Find it on eBayeBay ↗

قد تربح JunkPal عمولة من هذه الروابط.

Flip math

Profit after eBay fees, against the real sold value:

Sale price

You pay

Shipping

Ads %

Sale price$30.00

eBay fee (13.3%)−$3.98

Fixed order fee−$0.30

Shipping cost−$5.00

Net after fees$20.72

قيّم قطعتك مجاناً

Values are estimates from real sales data — not appraisals or offers (how we compute values). Some links earn JunkPal a commission at no cost to you (disclosure).

View as Markdown — this page as plain text, for LLMs and agents.

Price guide

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

Shop this on eBay ↗

Condition	Value	Based on
Loose	‏112.5 ر.س.‏ · $30	eBay sold comps
Complete (CIB)	‏487.5 ر.س.‏ · $130	eBay sold comps
Sealed (new)	‏528.75 ر.س.‏ · $141	eBay sold comps
Live asking — low / typical / high	‏30 ر.س.‏ / ‏299.96 ر.س.‏ / ‏1,118 ر.س.‏$8 / $79.99 / $298	20 live eBay listings ↗

Market check: As of July 19, 2026, 20 live eBay listings ask $8.00–$298.00 (median $79.99).

الأسئلة الشائعة

What is the best deal for this LEGO Mindstorms kit?: The best value depends on your needs; loose is $29, but sealed new is $136.
Can I buy this kit in a complete condition?: Yes, the complete (CIB) version is available for $130.
Is the sealed version the most valuable?: Yes, the sealed (new) condition is listed at $136.