Browse
- Sets
- All Sets
- New Sets
- Recently Retired Sets
- Sets Retiring Soon
- Sets Available Soon
- Minifigs
- All Minifigs
Deals
Analysis
- Sets
- Themes
- Subthemes
- Years
My Collection Sign In or Up

Region

Sets
Dacta
Technic
Mechanical Engineering

Why am I seeing ads?Sign In

9665 LEGO Dacta Technic Mechanical Engineering

Name: LEGO Dacta Technic Mechanical Engineering
Brand: LEGO
SKU: 9665-1
Rating: 4.5 (17 reviews)

Details

Images 1

9665 LEGO Dacta Technic Mechanical Engineering

Set Value (New/Sealed)

This represents the current new/sealed value of the set Mechanical Engineering since January 2003. Medium accuracy

LEGO 9665 Mechanical Engineering was a 318 piece Dacta set released in 2003.

Mechanical Engineering is an extremely rare LEGO set these days as we have not seen set 9665-1 currently for sale online or in the hundreds of retail stores good/new condition in over 2 years. Because of the rarity of this hard to find set the current estimated value of $447.42 might actually be much lower than the true value assuming this set can be found for sale.

Sets in Dacta / Technic


	9609 Technology Resource Set Theme / Subtheme Dacta / Technic Year 1995 Pieces 1,718 Availability Retired Buy this set at Bricklink	Value $991.33 I own this set I want this set

	1034 Teachers Resource Set Theme / Subtheme Dacta / Technic Year 1985 Pieces 1,501 Availability Retired Buy this set at eBay Bricklink	Retail $129.00 Value $1,001.99 Growth 676.7% Annual growth 7.6% I own this set I want this set

	9701 Control Lab Building Set Theme / Subtheme Dacta / Technic Year 1995 Pieces 557 Availability Retired Buy this set at Bricklink	Retail $149.00 Value $345.21 Growth 131.7% Annual growth 3.0% I own this set I want this set

	9700 Technic Control Centre Theme / Subtheme Dacta / Technic Year 1987 Pieces / Minifigs 471 / 4 Availability Retired Buy this set at eBay Bricklink	Value $302.08 I own this set I want this set

	1092 Technic Control II Theme / Subtheme Dacta / Technic Year 1986 Pieces 463 Availability Retired Buy this set at eBay Bricklink	Retail $191.00 Value $274.99 Growth 44.0% I own this set I want this set

	9618 Structures Set Theme / Subtheme Dacta / Technic Year 1997 Pieces 463 Availability Retired Buy this set at eBay	Retail $79.90 Value $119.65 Growth 49.7% Annual growth 1.6% I own this set I want this set

	1090 Technic Control 1 Theme / Subtheme Dacta / Technic Year 1986 Pieces 404 Availability Retired Buy this set at Bricklink	Retail $139.99 Value $231.85 Growth 65.6% Annual growth 2.3% I own this set I want this set

	1032 Technic II Powered Machines Set Theme / Subtheme Dacta / Technic Year 1984 Pieces 278 Availability Retired Buy this set at eBay Bricklink	Retail $79.99 Value $250.05 Growth 212.6% Annual growth 2.0% I own this set I want this set

	9630 Simple Mechanisms Set Theme / Subtheme Dacta / Technic Year 1997 Pieces 277 Availability Retired Buy this set at eBay Bricklink	Retail $79.99 Value $296.74 Growth 271.0% Annual growth 4.6% I own this set I want this set

	9605 4.5V Technic Resource Set Theme / Subtheme Dacta / Technic Year 1995 Pieces 268 Availability Retired Buy this set at Bricklink	Retail $74.99 Value $563.18 Growth 651.0% Annual growth 7.5% I own this set I want this set

	9702 Control System Building Set Theme / Subtheme Dacta / Technic Year 1993 Pieces / Minifigs 221 / 2 Availability Retired Buy this set at eBay Bricklink	Value $230.04 I own this set I want this set

	1030 Technic I Simple Machines Set Theme / Subtheme Dacta / Technic Year 1985 Pieces 179 Availability Retired Buy this set at eBay	Retail $74.99 Value $218.00 Growth 190.7% Annual growth 1.9% I own this set I want this set

	9604 Technic and Pneumatic Elements Theme / Subtheme Dacta / Technic Year 1992 Pieces 124 Availability Retired Buy this set at eBay	Retail $36.95 Value $101.17 Growth 173.8% Annual growth 3.3% I own this set I want this set

	1038 Universal Buggy Theme / Subtheme Dacta / Technic Year 1985 Pieces 119 Availability Retired Buy this set at ebay Bricklink	Value $87.11 I own this set I want this set

	9937 Small Chain Links Theme / Subtheme Dacta / Technic Year 1998 Pieces 108 Availability Retired Buy this set at Amazon ebay Bricklink	Retail $7.49 Value $12.16 Growth 62.3% Annual growth 2.6% I own this set I want this set

	9617 Introducing Air Power Theme / Subtheme Dacta / Technic Year 1997 Pieces 89 Availability Retired Buy this set at eBay Bricklink	Retail $29.99 Value $146.73 Growth 389.3% Annual growth 6.3% I own this set I want this set

	9614 Pulleys Mini Set Theme / Subtheme Dacta / Technic Year 1993 Pieces 77 Availability Retired Buy this set at eBay Bricklink	Retail $14.99 Value $30.39 Growth 102.7% Annual growth 2.1% I own this set I want this set

	9616 Wheels and Axles Set Theme / Subtheme Dacta / Technic Year 1997 Pieces / Minifigs 74 / 1 Availability Retired Buy this set at eBay Bricklink	Retail $14.99 Value $31.12 Growth 107.6% Annual growth 2.8% I own this set I want this set

	9610 Gears Set Theme / Subtheme Dacta / Technic Year 1993 Pieces / Minifigs 67 / 2 Availability Retired Buy this set at eBay Bricklink	Retail $12.50 Value $25.33 Growth 102.6% Annual growth 4.0% I own this set I want this set

	9612 Levers Set Theme / Subtheme Dacta / Technic Year 1993 Pieces 62 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $14.99 Value $32.08 Growth 114.0% Annual growth 3.7% I own this set I want this set

	9938 Conveyor Belt Links Theme / Subtheme Dacta / Technic Year 1995 Pieces 38 Availability Retired Buy this set at Bricklink	Retail $6.25 Value $24.17 Growth 286.7% Annual growth 3.1% I own this set I want this set

	9848 9V Lamps Theme / Subtheme Dacta / Technic Year 1997 Pieces 9 Availability Retired Buy this set at Bricklink	Value $38.36 I own this set I want this set

	9615 Motor Add-On for Simple Mechanisms Theme / Subtheme Dacta / Technic Year 1997 Pieces 3 Availability Retired Buy this set at eBay Bricklink	Retail $31.99 Value $44.84 Growth 40.2% Annual growth 1.3% I own this set I want this set

	9751 Control Lab Serial Interface & Adapter Theme / Subtheme Dacta / Technic Year 1995 Pieces 2 Availability Retired Buy this set at Bricklink	Value $129.92 I own this set I want this set

	9876 Large Turntables Theme / Subtheme Dacta / Technic Year 1992 Pieces 2 Availability Retired Buy this set at Bricklink	Retail $8.75 Value $17.98 Growth 105.5% Annual growth 3.7% I own this set I want this set

My Collection

I own this set

I want this set

Set Details

Set number

9665-1

Name

Mechanical Engineering

Theme

Dacta

Subtheme

Technic

Year

2003

Availability

Retired

Pieces

318 (PPP $0.47)

Set PricingRare

Retail price

$149.99

Value

$447.42

Growth

+198.30%

Annual growth

+5.62%

Quick Buy

eBay

Check

Price

~$460.84

Bricklink

Check

Price

~$451.89

*Listings are for new/sealed sets.

Why am I seeing ads?Sign In

Set Predictions

1 year forecast

$472.57

5 year forecast

$570.94

$566

$586

9665 Mechanical Engineering is estimated to be worth between $566 - $586 in 5 years (new/sealed).

Mechanical Engineering Reviews

17 ratings

4.5

Collectors

Investors

Subtheme Analysis

Dacta / Technic

Sets

Years

1984 - 2003

Annual growth

+2.91% (this set +5.62%)

This set's annual growth (CAGR) vs. subtheme

Community Stats

Mechanical Engineering currently ranks #29 out of the top most owned sets in Dacta Technic.

#1Technic I Simple Machines Set

#2Technic II Powered Machines Set

#3Simple Mechanisms Set

#4Gears Set

#5Levers Set

#29Mechanical Engineering

#30Sound Element

About Dacta Technic

Technic is a subtheme of Dacta that consists of 30 sets that as of now ran from 1984 to 2003. As of today, 1034 Teachers Resource Set is the most valuable set in Dacta Technic with an estimated new/factory sealed value of $1,001.99.

Dacta was an original LEGO theme from 1960 to 2003 that deals with all things that can be used with educational facilities, such as DUPLO and TECHNIC. Dacta was later replaced by the LEGO Education theme. Sets in the Dacta product line were exclusively developed for usage in younger aged schools so the sets typically contain a large amount of pieces for playing and learning in groups. The sets were designed to contain a higher number of bricks and elements at a lower cost.

Change region and currency

Explore

Sets Minifigs Deals

About Us

About BrickEconomy Contact Us

Support Us

Helpful Links

FAQs Widgets Sitemap

Follow BrickEconomy

LEGO, the LEGO logo, the Minifigure and the brick and knob configurations are trademarks and/or copyrights of the LEGO Group of companies which does not sponsor, authorize or endorse this site.
BrickEconomy, the BrickEconomy logo and all content not covered by The LEGO Group's copyright is, unless otherwise stated, ©2023 BrickEconomy.

Change Region

United States
Canada
Australia
China

European Union
United Kingdon
Germany
South Korea

Changes the pricing currency and date formats to a specific region.

Sign In

Remember me

Forgot password?

Don't have an account? Sign up for free!