Browse
- Sets
- All Sets
- New Sets
- Recently Retired Sets
- Sets Retiring Soon
- Sets Available Soon
- Set Release Rumors
- Minifigs
- All Minifigs
- New Minifigs
- Recently Retired Minifigs
- Minifigs Retiring Soon
Deals
Analysis
- Sets
- Themes
- Subthemes
- Years
- Most Valuable
- Most Expensive
- Most Owned
- BE 100 Index
- Minifigures
- Most Valuable
- Most Owned
My CollectionSign In or Up

Sets
Marvel Super Heroes
Mech Armor Collection 3 in 1

66671 LEGO Mech Armor Collection 3 in 1

Name: LEGO Mech Armor Collection 3 in 1
Brand: LEGO
SKU: 66671-1
Availability: InStock
Rating: 4.70 (22 reviews)

Images 4

LEGO 66671 Mech Armor Collection 3 in 1 is a Marvel Super Heroes set currently valued at $76 for new and sealed sets. Annual appreciation has averaged 15.72% since release. Used copies are valued between $34 and $42 depending on condition. Secondary market prices for new and sealed sets typically fall between $74 and $81.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Mech Armor Collection 3 in 1 since June 2021. Very high accuracy

LEGO 66671 Mech Armor Collection 3 in 1 is a Marvel Super Heroes value pack released in 2021, containing 385 pieces and 3 minifigures. It bundles sets 76168 Captain America Mech Armor, 76169 Thor Mech Armor, and 76171 Miles Morales Mech Armor. Each build assembles a posable mech with an opening cockpit for the included minifigure and character-specific accessories such as Captain America’s shield, Thor’s Mjölnir, and Miles Morales web elements. The pack was a U.S. retailer exclusive available at Costco.

A new and sealed Mech Armor Collection 3 in 1 is currently valued at around $76, with annual growth of about 10.5% that is expected to level off to around 8.1% in the coming year, making it a solid investment. The average used price is $35 for those in good overall condition. Based on current trends, this set could be valued near $80 within the next year. New and sealed listings currently range from $75 to $100.

All regions

All regions 11
United States 7
Canada 4

For Sale (New/Sealed)

	(US) Marvel Super Heroes: Mech Armor Collection Costco 3-in-1 Pack (66671), NISB	BrickEconomy Choice $70.00
	(CA) Marvel Mech Armor Collection 3 In 1 Pack 66671 New/Sealed in Box - RETIRED	$72.09 -5.7%
	(US) Marvel Mech Armor Collection 385 Pieces Kit# 66671 3 In 1 Building Toys	$74.95 -1.9%
	(CA) BrickLink store thunders brick den	$76.17 -0.3%
	(CA) Super Heroes: Mech Armor Collection (66671) 3 in 1 Pack NEW SEALED	$79.40 +3.9%
	(US) Marvel 66671 Mech Armor Collection Captain America Miles Morales Thor 3 in1	$79.95 +4.6%
	(US) BrickLink store Rudy's Bricks & Minifigs	$90.00 +17.8%
	(US) Marvel Super Heroes: Mech armour collection 3 in 1 (66671)	$100.00 +30.8%
	(US) NEW FACTORY SEALED LEGO Super Heroes: Mech Armor Collection (66671)	$100.00 +30.8%
	(US) Super Heroes: Mech Armor Collection (66671) 76169 76171 76168 3-in-1 Pack	$100.00 +30.8%
	(CA) Marvel Super Heroes: Mech armour collection 3 in 1 (66671) Retired	$129.99 +70.1%

Sales Distribution (Last 90 Days)

This chart shows the distribution of sales for the past three months of new/sealed 66671 Mech Armor Collection 3 in 1.

Sale Trends

This chart shows the sales trends (number sold) of new/sealed 66671 Mech Armor Collection 3 in 1.

Related Sets


	76169 Thor Mech Armor Theme / Subtheme Marvel Super Heroes / Avengers Year 2021 Pieces / Minifigs 139 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $9.99 Value $32.71 Growth +227.4% Annual growth 19.8% I own this set I want this set

	76171 Miles Morales Mech Armor Theme / Subtheme Marvel Super Heroes / Spider-Man Year 2021 Pieces / Minifigs 125 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $9.99 Value $19.99 Growth +100.1% Annual growth 8.6% I own this set I want this set

	76168 Captain America Mech Armor Theme / Subtheme Marvel Super Heroes / Avengers Year 2021 Pieces / Minifigs 121 / 1 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $9.99 Value $40.00 Growth +300.4% Annual growth 23.7% I own this set I want this set

Sets in Marvel Super Heroes


	76178 Daily Bugle Theme / Subtheme Marvel Super Heroes / Spider-Man Year 2021 Pieces / Minifigs 3,772 / 25 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $349.99 Value $503.83 Growth +44.0% I own this set I want this set

	76193 The Guardians' Ship Theme / Subtheme Marvel Super Heroes / Avengers Endgame Year 2021 Pieces / Minifigs 1,901 / 6 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $159.99 Value $197.16 Growth +23.2% Annual growth 5.4% I own this set I want this set

	76156 Rise of the Domo Theme / Subtheme Marvel Super Heroes / Eternals Year 2021 Pieces / Minifigs 1,040 / 6 Availability Retired Buy this set at Amazon eBay	Retail $89.99 Value $80.00 I own this set I want this set

	76191 Infinity Gauntlet Theme / Subtheme Marvel Super Heroes / Avengers Infinity War Year 2021 Pieces 590 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $79.99 Value $90.00 Growth +12.5% I own this set I want this set

	76187 Venom Theme / Subtheme Marvel Super Heroes / Spider-Man Year 2021 Pieces 565 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $69.99 Value $89.99 Growth +28.6% Annual growth 10.1% I own this set I want this set

	76199 Carnage Theme / Subtheme Marvel Super Heroes / Spider-Man Year 2021 Pieces 546 Availability Retired Buy this set at Amazon eBay	Retail $59.99 Value $119.97 Growth +100.0% Annual growth 20.0% I own this set I want this set

	76192 Avengers Endgame Final Battle Theme / Subtheme Marvel Super Heroes / Avengers Endgame Year 2021 Pieces / Minifigs 527 / 7 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $69.99 Value $79.99 Growth +14.3% Annual growth 3.6% I own this set I want this set

	76155 In Arishem's Shadow Theme / Subtheme Marvel Super Heroes / Eternals Year 2021 Pieces / Minifigs 493 / 4 Availability Retired Buy this set at Amazon eBay	Retail $59.99 Value $54.08 I own this set I want this set

	76190 Iron Man Iron Monger Mayhem Theme / Subtheme Marvel Super Heroes / Iron Man Year 2021 Pieces / Minifigs 479 / 3 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $39.99 Value $74.44 Growth +86.1% Annual growth 17.8% I own this set I want this set

	76175 Attack on the Spider Lair Theme / Subtheme Marvel Super Heroes / Spider-Man Year 2021 Pieces / Minifigs 466 / 6 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $69.99 Value $118.40 Growth +69.2% Annual growth 14.8% I own this set I want this set

	76174 Spider-Man's Monster Truck vs. Mysterio Theme / Subtheme Marvel Super Heroes / Spider-Man Year 2021 Pieces / Minifigs 439 / 4 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $39.99 Value $72.61 Growth +81.6% Annual growth 10.4% I own this set I want this set

	76177 Battle at the Ancient Village Theme / Subtheme Marvel Super Heroes / ShangChi and the Legend of the Ten Rings Year 2021 Pieces / Minifigs 400 / 4 Availability Retired Buy this set at Amazon eBay	Retail $39.99 Value $39.72 I own this set I want this set

	76194 Tony Stark's Sakaarian Iron Man Theme / Subtheme Marvel Super Heroes / What If? Year 2021 Pieces / Minifigs 369 / 3 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $34.99 Value $39.99 Growth +14.3% Annual growth 3.7% I own this set I want this set

	76185 Spider-Man at the Sanctum Workshop Theme / Subtheme Marvel Super Heroes / Spider-Man No Way Home Year 2021 Pieces / Minifigs 355 / 4 Availability Retired Buy this set at Amazon eBay	Retail $39.99 Value $44.53 Growth +11.4% Annual growth 2.9% I own this set I want this set

	76201 Captain Carter & The Hydra Stomper Theme / Subtheme Marvel Super Heroes / What If? Year 2021 Pieces / Minifigs 343 / 3 Availability Retired Buy this set at Amazon eBay	Retail $29.99 Value $35.00 Growth +16.7% Annual growth 4.4% I own this set I want this set

	76237 Sanctuary II Endgame Battle Theme / Subtheme Marvel Super Heroes / Avengers Endgame Year 2021 Pieces / Minifigs 322 / 3 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $39.99 Value $51.48 Growth +28.7% Annual growth 5.6% I own this set I want this set

	76176 Escape from The Ten Rings Theme / Subtheme Marvel Super Heroes / ShangChi and the Legend of the Ten Rings Year 2021 Pieces / Minifigs 321 / 4 Availability Retired Buy this set at Amazon eBay	Retail $29.99 Value $29.95 I own this set I want this set

	76198 Spider-Man & Doctor Octopus Mech Battle Theme / Subtheme Marvel Super Heroes / Spider-Man Year 2021 Pieces / Minifigs 305 / 2 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $19.99 Value $44.99 Growth +125.1% Annual growth 15.6% I own this set I want this set

	76196 The Avengers Advent Calendar Theme / Subtheme Marvel Super Heroes / Seasonal Year 2021 Pieces / Minifigs 298 / 7 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $39.99 Value $49.92 Growth +24.8% Annual growth 2.9% I own this set I want this set

	76200 Bro Thor's New Asgard Theme / Subtheme Marvel Super Heroes / Avengers Endgame Year 2021 Pieces / Minifigs 265 / 2 Availability Retired Buy this set at Amazon eBay	Retail $29.99 Value $38.86 Growth +29.6% Annual growth 7.3% I own this set I want this set

	76173 Spider-Man and Ghost Rider vs. Carnage Theme / Subtheme Marvel Super Heroes / Spider-Man Year 2021 Pieces / Minifigs 212 / 3 Availability Retired Buy this set at Amazon eBay	Retail $19.99 Value $47.28 Growth +136.5% Annual growth 21.2% I own this set I want this set

	76186 Black Panther Dragon Flyer Theme / Subtheme Marvel Super Heroes / Avengers Endgame Year 2021 Pieces / Minifigs 202 / 3 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $19.99 Value $18.71 I own this set I want this set

	76195 Spider-Man's Drone Duel Theme / Subtheme Marvel Super Heroes / Spider-Man Homecoming Year 2021 Pieces / Minifigs 198 / 2 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $19.99 Value $37.92 Growth +89.7% Annual growth 19.1% I own this set I want this set

	76154 Deviant Ambush! Theme / Subtheme Marvel Super Heroes / Eternals Year 2021 Pieces / Minifigs 197 / 3 Availability Retired Buy this set at Amazon eBay	Retail $24.99 Value $25.25 Growth +1.0% I own this set I want this set

	76145 Eternals' Aerial Assault Theme / Subtheme Marvel Super Heroes / Eternals Year 2021 Pieces / Minifigs 133 / 2 Availability Retired Buy this set at Amazon eBay Bricklink	Retail $9.99 Value $14.74 Growth +47.5% Annual growth 6.8% I own this set I want this set

My Collection

I own this set

I want this set

Set Details

Set number

66671-1

Name

Mech Armor Collection 3 in 1

Theme

Marvel Super Heroes

Year

2021

Availability

Retired

Pieces

385 (PPP $0.06)

Set Pricing

Retail price

$23.99

New/Sealed

Value

$76.43

Growth

+218.59%

Annual growth

+15.72%

2025 growth

+3.37%

Future growth

+8.07% (2-3 year outlook)

90-day change

-1.77%

Used

Value

$35.00

Range

$34.30 - $42.00

Quick Buy

eBay

Buy

Lowest price

$70.00

Highest price

$129.99

Bricklink

Buy

Lowest price

$76.17 (CA)

Highest price

$90.00

*Listings are for new/sealed sets.

Set Predictions

New/Sealed

Today's value

$76.43

1 year forecast

$79.82+4.44%

5 year forecast

$101.57+32.90%

$97

$105

66671 Mech Armor Collection 3 in 1 is projected to be valued between $97 - $105 within five years.

Insights

Retailer-limited multipack status makes Mech Armor Collection 3 in 1 (Marvel Super Heroes) a scarce sealed-bundle item since its retirement, and that constrained availability has driven short-term premiums, while lack of exclusive minifigure content and frequent mech refreshes limit longer-term upside and raise remake risk.

Set Facts

The set was available in Costco stores in the United States.

Barcodes

UPC

673419354813

Mech Armor Collection 3 in 1 Reviews

22 ratings

4.7

Collectors

Investors

Is this LEGO set a good investment?

“Most Marvel Super Heroes sets have risen about 6% per year, but LEGO Mech Armor Collection 3 in 1 has consistently outperformed by roughly 39%, with a typical yearly return near 11%. It looks like a solid investment so far.”

Review brought to you by BrickEconomy Bot

Subtheme Analysis

Marvel Super Heroes

Sets

392

Years

2012 - 2026

Annual growth

+6.46% (this set +15.72%)

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

Community Stats

Mech Armor Collection 3 in 1 currently ranks #296 out of the top most owned sets in Marvel Super Heroes.

#5Bro Thor's New Asgard

#296Mech Armor Collection 3 in 1

#297Thor

#298Venom

About Marvel Super Heroes

The LEGO Marvel Super Heroes theme is based on the characters created by Marvel Comics. Originally Marvel was a subtheme of the LEGO Super Heroes theme but was later separated into its own theme. Over time, sets in the Marvel Super Heroes theme includes most characters and situations released to the marvel Universe from films to the comics to TV series. The first wave of Marvel sets was released in 2012 and consisted of sets based on The Avengers and the X-Men comic books as well as the Ultimate Spider-Man TV series.

Set Pricing Models

BrickEconomy uses a number of methods to determine the value of a set.

New/Sealed

Machine Learning/AI Model

Value (today)

$76.43

Value (in a year)

$86.64

Value (in 2 years)

$94.48

Accuracy

0.961000 Very high

Statistical Model

Value (today)

$88.64

Value (in a year)

$97.68

Value (in two years)

$106.74

Accuracy

0.543187 Medium

Used

Machine Learning/AI Model

Value (today)

$35.00

Value (low range)

$34.30

Value (high range)

$42.00

Accuracy

0.906000 High

To learn more about how we calculate pricing and forecasting, check out our article on BrickEconomy’s Approach to LEGO Pricing and Future Value Predictions.

Region · United States (USD)

Theme · Light

Explore

Sets Minifigs Deals

About Us

About BrickEconomy Contact Us Support Us

Helpful Links

FAQs Widgets Sitemap

Follow BrickEconomy

Facebook

Twitter/X

Instagram

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, ©2026 BrickEconomy.

Change Region

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