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Sets
Basic
Basic Building Set

504 LEGO Basic Building Set

Name: LEGO Basic Building Set
Brand: LEGO
SKU: 504-1
Availability: InStock
Rating: 4.60 (49 reviews)

Images 1

LEGO 504 Basic Building Set is a vintage Basic set from 1985 valued at $48 for new and sealed sets, up 1125% from an original retail price of $3.95. Annual appreciation has averaged 5.54% since release. On the used market, values range from $25 to $45 based on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Basic Building Set since August 2016. High accuracy

LEGO 504-1 Basic Building Set is a Basic theme set released in 1985, containing 41 pieces. It provides a small assortment of standard bricks and plates intended for free-building and simple models. It includes various bricks (1×1 through 2×8), plates (2×3, 2×4), and two modified 2×2 bricks with attached wheels/tire assemblies. In line with other mid-1980s Basic assortments, it emphasizes generic elements over specialized parts. The set functioned as a compact starter box for expanding a parts collection.

A new and sealed Basic Building Set is currently valued at around $48, with annual growth of approximately 4%. The average used price is $40 for those in good overall condition. New and sealed listings currently range from $49 to $50. Based on current trends, this set could be valued near $51 within the next year.

All regions

All regions 4
United States 4

For Sale (New/Sealed)

	(US) Basic: Building Set, Trial Size Offer (1965)	BrickEconomy Choice $39.99
	(US) Basic: Basic Building Set (520) New Box Has Wear and Tear Vintage	$49.00 +1.2%
	(US) Vintage LEGO Basic Building Set (533) Sealed NOS/New	$49.99 +3.3%
	(US) VTG LEGO BASIC BUILDING SET #527 (191 pcs) 1987 Complete Set NOS	$72.95 +50.7%

More sets in Basic


	540 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 626 / 2 Availability Retired Buy this set at Bricklink	Retail $19.95 Value $96.62 Growth +384.3% Annual growth 3.3% I own this set I want this set

	550 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 569 / 2 Availability Retired Buy this set at eBay	Retail $42.00 Value $360.84 Growth +759.1% Annual growth 5.1% I own this set I want this set

	740 Basic Building Set Theme Basic Year 1985 Pieces 516 Availability Retired Buy this set at Bricklink	Retail $60.00 Value $307.20 Growth +412.0% Annual growth 4.1% I own this set I want this set

	730-2 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 429 / 2 Availability Retired Buy this set at Bricklink	Retail $30.00 Value $123.11 Growth +310.4% Annual growth 3.5% I own this set I want this set

	720 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 334 / 1 Availability Retired Buy this set at Bricklink	Retail $25.00 Value $253.05 Growth +912.2% Annual growth 5.4% I own this set I want this set

	350-2 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 311 / 4 Availability Retired Buy this set at eBay	Retail $14.95 Value $323.57 Growth +2064.3% Annual growth 8.9% I own this set I want this set

	530 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 269 / 2 Availability Retired Buy this set at Bricklink	Retail $14.95 Value $99.75 Growth +567.2% Annual growth 3.8% I own this set I want this set

	340 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 214 / 2 Availability Retired Buy this set at eBay	Retail $2.95 Value $76.20 Growth +2483.1% Annual growth 8.3% I own this set I want this set

	1962 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 211 / 1 Availability Retired Buy this set at eBay	Retail $15.00 Value $224.73 Growth +1398.2% Annual growth 6.8% I own this set I want this set

	1520 Basic Building Set with Storage Case Theme Basic Year 1985 Pieces / Minifigs 210 / 1 Availability Retired Buy this set at eBay Bricklink	Retail $16.49 Value $206.41 Growth +1151.7% Annual growth 6.4% I own this set I want this set

	520 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 165 / 1 Availability Retired Buy this set at eBay	Retail $12.95 Value $48.57 Growth +275.1% Annual growth 3.3% I own this set I want this set

	330 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 156 / 2 Availability Retired Buy this set at eBay Bricklink	Retail $9.95 Value $118.39 Growth +1089.8% Annual growth 6.2% I own this set I want this set

	510 Basic Building Set Theme Basic Year 1985 Pieces 106 Availability Retired Buy this set at eBay	Retail $3.50 Value $63.40 Growth +1711.4% Annual growth 6.7% I own this set I want this set

	320 Basic Building Set Theme Basic Year 1985 Pieces / Minifigs 77 / 1 Availability Retired Buy this set at eBay	Retail $7.97 Value $42.50 Growth +433.2% Annual growth 4.0% I own this set I want this set

	508 Basic Building Set Theme Basic Year 1985 Pieces 66 Availability Retired Buy this set at Bricklink	Retail $4.95 Value $19.74 Growth +298.8% Annual growth 2.3% I own this set I want this set

	310-4 Basic Building Set Theme Basic Year 1985 Pieces 46 Availability Retired Buy this set at eBay	Retail $5.00 Value $29.52 Growth +490.4% Annual growth 2.8% I own this set I want this set

	1548-2 Helicopter Theme Basic Year 1985 Pieces 36 Availability Retired Buy this set at eBay	promotional Value $167.63 Annual growth 5.5% I own this set I want this set

	1562-2 Basic Building Set Theme Basic Year 1985 Pieces 32 Availability Retired Buy this set at eBay	Retail $4.00 Value $12.87 Growth +221.8% Annual growth 2.9% I own this set I want this set

	1965 Building Set Trial Size Offer Theme Basic Year 1985 Pieces / Minifigs 32 / 1 Availability Retired Buy this set at eBay Bricklink	Retail $1.50 Value $125.00 Growth +8233.3% Annual growth 14.0% I own this set I want this set

	304 Basic Building Set Theme Basic Year 1985 Pieces 31 Availability Retired Buy this set at eBay	Retail $2.00 Value $16.08 Growth +704.0% Annual growth 3.7% I own this set I want this set

	308-2 Basic Building Set Theme Basic Year 1985 Pieces 30 Availability Retired Buy this set at eBay Bricklink	Retail $3.00 Value $25.00 Growth +733.3% Annual growth 5.3% I own this set I want this set

	1964 Basic Building Set Theme Basic Year 1985 Pieces 27 Availability Retired Buy this set at eBay Bricklink	Retail $1.49 Value $28.71 Growth +1826.8% Annual growth 7.5% I own this set I want this set

	1546 Aircraft Theme Basic Year 1985 Pieces / Minifigs 26 / 1 Availability Retired Buy this set at Bricklink	promotional Value $100.49 Annual growth 10.4% I own this set I want this set

	1551 Duck Theme Basic Year 1985 Pieces 6 Availability Retired Buy this set at eBay Bricklink	Retail $0.40 Value $5.00 Growth +1150.0% Annual growth 8.7% I own this set I want this set

	293-2 Basic Building Set Theme Basic Year 1985 Availability Retired	Retail $7.00 I own this set I want this set

My Collection

I own this set

I want this set

Set Details

Set number

504-1

Name

Basic Building Set

Theme

Basic

Year

1985

Availability

Retired

Pieces

41 (PPP $0.10)

Set Pricing

Retail price

$3.95

New/Sealed

Value

$48.40

Growth

+1125.32%

Annual growth

+5.54%

90-day change

37.40%

Used

Value

$40.17

Range

$24.60 - $44.71

Quick Buy

eBay

Buy

Lowest price

$39.99

Highest price

$72.95

*Listings are for new/sealed sets.

Set Predictions

New/Sealed

Today's value

$48.40

1 year forecast

$51.08+5.54%

5 year forecast

$61.68+27.44%

$60

$63

504 Basic Building Set is projected to be valued between $60 - $63 within five years.

Insights

Released in the mid-1980s and long-retired, Basic Building Set (504) is a generic Basic assortment whose scarcity of sealed copies has supported historical sealed gains, and it carries limited distinctiveness and thinner trading depth that make it more suitable for completeness-focused collectors than as a core investment.

Set Facts

The set includes standard bricks in multiple colors, such as 1x2, 2x2, and 2x4 sizes in black, blue, red, white, and yellow.
There is a unique black modified 2x2 brick with red wheels, paired with small black tires (15mm diameter, 6mm offset tread).
The parts selection also features trans-clear 1x2 bricks and various red plates in 2x3 and 2x4 sizes.

Basic Building Set Reviews

49 ratings

4.6

Collectors

Investors

Theme Analysis

Basic

Sets

402

Years

1972 - 2003

Annual growth

+3.86% (this set +5.54%)

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

Community Stats

Basic Building Set currently ranks #365 out of the top most owned sets in Basic.

#1Building Plate, Green

#2X-Large Baseplate Grey

#3Brick Separator, Green

#4Universal Building Set

#5Basic Building Set

#365Basic Building Set

#366Basic Building Set

#367Basic Building Set

About Basic

The LEGO Basic theme, which began in the 1970s, was designed to be a more general, non-thematic series of sets. Unlike the themed sets that revolve around specific stories, characters, or concepts (e.g., space, city, or pirates), the Basic theme provided a collection of standard LEGO bricks and pieces, often in a variety of colors. The goal was to encourage free building and creativity without the confines of a specific theme or narrative.

Set Pricing Models

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

New/Sealed

Machine Learning/AI Model

Value (today)

$48.40

Value (in a year)

$51.08

Value (in 2 years)

$53.77

Accuracy

0.960300 Very high

Statistical Model

Value (today)

$39.36

Value (in a year)

$42.01

Value (in two years)

$44.68

Accuracy

0.492013 Low

Used

Machine Learning/AI Model

Value (today)

$40.17

Value (low range)

$24.60

Value (high range)

$44.71

Accuracy

0.905300 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

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