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Sets
Basic
Basic Building Set

304 LEGO Basic Building Set

Name: LEGO Basic Building Set
Brand: LEGO
SKU: 304-1
Availability: InStock
Rating: 4.60 (42 reviews)

Images 1

LEGO 304 Basic Building Set is a vintage Basic set from 1985 valued at $15 for new and sealed sets, up 666% from an original retail price of $2.00. Annual appreciation has averaged 3.62% since release. Used copies are valued between $4 and $5 depending on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Basic Building Set since June 2016. Very high accuracy

LEGO 304-1 Basic Building Set is a Basic set released in 1985, containing 31 pieces. The assortment includes 2x2, 2x3, and 2x4 bricks in blue, red, yellow, and white. Notable elements include a green 4x12 brick and a red 2x8 brick, reflecting the straightforward brick selection typical of the mid-1980s Basic line.

A new and sealed Basic Building Set is currently valued at around $15, with annual growth of approximately 2%, which is lower than other Basic sets. The average used price is $4 for those in good overall condition. Based on current trends, this set could be valued near $16 within the next year. New and sealed listings currently range from $12 to $22.

All regions

All regions 7
United States 6
Canada 1

For Sale (New/Sealed)

	(US) - Box matches large picture. Box is sealed, but does have wear(one corner has a dent,...	$12.00 -21.6%
	(US) New with instructions, inner bag sealed, box has been opened.	$12.00 -21.6%
	(CA) Basic Building Toy Set #304	$13.06 -14.7%
	(US) NEW SEALED VINTAGE LEGO Basic: Basic Set 3+ (1605)	BrickEconomy Choice $15.95 +4.2%
	(US) 1985, Rare set MISB in very good condition. Box has some light wear on the corners an...	$20.00 +30.6%
	(US) BOX MATCHES LG. IMAGE AND DATED 1985,BOX A LITTLE CREASED ON ONE END.	$22.00 +43.7%
	(US) 1985 Vintage LEGO Basic Building Block Set #304 Sealed Boxed FREESHIP	$29.99 +95.9%

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 $96.45 Growth +383.5% 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 $359.96 Growth +757.0% 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 $122.92 Growth +309.7% 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 $250.00 Growth +900.0% 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 $311.56 Growth +1984.0% Annual growth 8.8% 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 $75.91 Growth +2473.2% Annual growth 8.2% 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 $224.03 Growth +1393.5% 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 $205.82 Growth +1148.2% 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 $46.65 Growth +260.2% Annual growth 3.2% 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 $118.06 Growth +1086.5% 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 $45.84 Growth +475.2% 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 $21.94 Growth +343.2% Annual growth 2.4% 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 $34.52 Growth +590.4% Annual growth 2.9% I own this set I want this set

	504 Basic Building Set Theme Basic Year 1985 Pieces 41 Availability Retired Buy this set at eBay	Retail $3.95 Value $44.07 Growth +1015.7% Annual growth 4.6% 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 $173.80 Annual growth 5.6% 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 $13.90 Growth +247.5% Annual growth 3.1% 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

	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	Retail $1.49 Value $24.43 Growth +1539.6% Annual growth 7.1% 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 $100.08 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

304-1

Name

Basic Building Set

Theme

Basic

Year

1985

Availability

Retired

Pieces

31 (PPP $0.06)

Set Pricing

Retail price

$2.00

New/Sealed

Value

$15.31

Growth

+665.50%

Annual growth

+3.62% Increasing

Rolling growth

+1.05% (Previous 12 months)

Future growth

+7.86% (2 year outlook)

90-day change

-1.39%

Used

Value

$3.99

Range

$3.91 - $4.79

Quick Buy

eBay

Buy

Lowest price

$13.06

Highest price

$29.99

Bricklink

Buy

Lowest price

$12.00

Highest price

$22.00

*Listings are for new/sealed sets.

Set Predictions

New/Sealed

Today's value

$15.31

1 year forecast

$15.86+3.62%

5 year forecast

$18.05+17.92%

$17

$19

304 Basic Building Set is projected to be valued between $17 - $19 within five years.

Insights

A long-retired Basic Building Set, 304, is a mid-1980s Basic release whose scarce sealed copies have supported post-retirement gains, and its generic assortment without unique elements keeps demand narrow and transaction volume thin.

Set Facts

The set contains 2x2, 2x3, and 2x4 bricks in blue, red, yellow, and white. The set also includes a unique green 4x12 brick, as well as a red 2x8 brick.

Basic Building Set Reviews

42 ratings

4.6

Collectors

Investors

Theme Analysis

Basic

Sets

402

Years

1972 - 2003

Annual growth

+3.89% (this set +3.62%)

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

Community Stats

Basic Building Set currently ranks #328 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

#328Basic Building Set

#329Basic Building Set

#330Basic 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)

$15.31

Value (in a year)

$15.86

Value (in 2 years)

$16.42

Accuracy

0.960400 Very high

Statistical Model

Value (today)

$18.89

Value (in a year)

$19.51

Value (in two years)

$20.14

Accuracy

0.247968 Very low

Used

Machine Learning/AI Model

Value (today)

$3.99

Value (low range)

$3.91

Value (high range)

$4.79

Accuracy

0.905400 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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