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.

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
540 LEGO Basic Building Set
Retail $19.95
Value $96.62
Growth  +384.3%
Annual growth 3.3%

550 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 569 / 2
Availability Retired
550 LEGO Basic Building Set
Retail $42.00
Value $360.84
Growth  +759.1%
Annual growth 5.1%

740 Basic Building Set

Theme Basic
Year 1985
Pieces 516
Availability Retired
740 LEGO Basic Building Set
Retail $60.00
Value $307.20
Growth  +412.0%
Annual growth 4.1%

730-2 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 429 / 2
Availability Retired
730-2 LEGO Basic Building Set
Retail $30.00
Value $123.11
Growth  +310.4%
Annual growth 3.5%

720 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 334 / 1
Availability Retired
720 LEGO Basic Building Set
Retail $25.00
Value $253.05
Growth  +912.2%
Annual growth 5.4%

350-2 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 311 / 4
Availability Retired
350-2 LEGO Basic Building Set
Retail $14.95
Value $323.57
Growth  +2064.3%
Annual growth 8.9%

530 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 269 / 2
Availability Retired
530 LEGO Basic Building Set
Retail $14.95
Value $99.75
Growth  +567.2%
Annual growth 3.8%

340 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 214 / 2
Availability Retired
340 LEGO Basic Building Set
Retail $2.95
Value $76.20
Growth  +2483.1%
Annual growth 8.3%

1962 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 211 / 1
Availability Retired
1962 LEGO Basic Building Set
Retail $15.00
Value $224.73
Growth  +1398.2%
Annual growth 6.8%

1520 Basic Building Set with Storage Case

Theme Basic
Year 1985
Pieces / Minifigs 210 / 1
Availability Retired
1520 LEGO Basic Building Set with Storage Case
Retail $16.49
Value $206.41
Growth  +1151.7%
Annual growth 6.4%

520 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 165 / 1
Availability Retired
520 LEGO Basic Building Set
Retail $12.95
Value $48.57
Growth  +275.1%
Annual growth 3.3%

330 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 156 / 2
Availability Retired
330 LEGO Basic Building Set
Retail $9.95
Value $118.39
Growth  +1089.8%
Annual growth 6.2%

510 Basic Building Set

Theme Basic
Year 1985
Pieces 106
Availability Retired
510 LEGO Basic Building Set
Retail $3.50
Value $63.40
Growth  +1711.4%
Annual growth 6.7%

320 Basic Building Set

Theme Basic
Year 1985
Pieces / Minifigs 77 / 1
Availability Retired
320 LEGO Basic Building Set
Retail $7.97
Value $42.50
Growth  +433.2%
Annual growth 4.0%

508 Basic Building Set

Theme Basic
Year 1985
Pieces 66
Availability Retired
508 LEGO Basic Building Set
Retail $4.95
Value $19.74
Growth  +298.8%
Annual growth 2.3%

310-4 Basic Building Set

Theme Basic
Year 1985
Pieces 46
Availability Retired
310-4 LEGO Basic Building Set
Retail $5.00
Value $29.52
Growth  +490.4%
Annual growth 2.8%

1548-2 Helicopter

Theme Basic
Year 1985
Pieces 36
Availability Retired
1548-2 LEGO Helicopter
promotional
Value $167.63
Annual growth 5.5%

1562-2 Basic Building Set

Theme Basic
Year 1985
Pieces 32
Availability Retired
1562-2 LEGO Basic Building Set
Retail $4.00
Value $12.87
Growth  +221.8%
Annual growth 2.9%

1965 Building Set Trial Size Offer

Theme Basic
Year 1985
Pieces / Minifigs 32 / 1
Availability Retired
1965 LEGO Building Set Trial Size Offer
Retail $1.50
Value $125.00
Growth  +8233.3%
Annual growth 14.0%

304 Basic Building Set

Theme Basic
Year 1985
Pieces 31
Availability Retired
304 LEGO Basic Building Set
Retail $2.00
Value $16.08
Growth  +704.0%
Annual growth 3.7%

308-2 Basic Building Set

Theme Basic
Year 1985
Pieces 30
Availability Retired
308-2 LEGO Basic Building Set
Retail $3.00
Value $25.00
Growth  +733.3%
Annual growth 5.3%

1964 Basic Building Set

Theme Basic
Year 1985
Pieces 27
Availability Retired
1964 LEGO Basic Building Set
Retail $1.49
Value $28.71
Growth  +1826.8%
Annual growth 7.5%

1546 Aircraft

Theme Basic
Year 1985
Pieces / Minifigs 26 / 1
Availability Retired
1546 LEGO Aircraft
promotional
Value $100.49
Annual growth 10.4%

1551 Duck

Theme Basic
Year 1985
Pieces 6
Availability Retired
1551 LEGO Duck
Retail $0.40
Value $5.00
Growth  +1150.0%
Annual growth 8.7%

293-2 Basic Building Set

Theme Basic
Year 1985
Availability Retired
293-2 LEGO Basic Building Set
Retail $7.00