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Building Set

Building Set

8040-1·LEGO·1984·51 parts

Used Avg
$23.88
New Avg
$117.94
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About Building Set

Building Set (8040-1) is a LEGO LEGO set from 1984 valued at $23.88 on BrickLink. It contains 51 cataloged parts. This set has been retired and is only available on the secondary market.

Seller notes

  • Sealed copies sell for $117.94 vs $23.88 used — a 394% premium. If you have this set new in sealed box (NISB), price it accordingly.

Parts (51)

Brick 2 x 4
Brick 2 x 4
Plate 2 x 3
Plate 2 x 3
×4
Plate 2 x 2
Plate 2 x 2
×2
Plate 1 x 2
Plate 1 x 2
×10
Plate 1 x 2
Plate 1 x 2
×2
Plate 1 x 2
Plate 1 x 2
×7
Plate 4 x 8
Plate 4 x 8
×2
Tile 1 x 2
Tile 1 x 2
×2
Plate 1 x 8
Plate 1 x 8
Wheel with Split Axle Hole
Wheel with Split Axle Hole
×4
Tire 17 x 43
Tire 17 x 43
×4
Technic, Gear 8 Tooth
Technic, Gear 8 Tooth
×5
Technic, Gear 24 Tooth Crown - Not Reinforced
Technic, Gear 24 Tooth Crown - Not Reinforced
Technic, Axle and Pin Connector
Technic, Axle and Pin Connector
×4
Plate 1 x 6
Plate 1 x 6
×2
Technic, Pin without Friction Ridges
Technic, Pin without Friction Ridges
×8
Technic, Brick 1 x 2 with Hole
Technic, Brick 1 x 2 with Hole
×8
Technic, Brick 1 x 2 with Hole
Technic, Brick 1 x 2 with Hole
×4
Technic, Brick 1 x 4 with Holes
Technic, Brick 1 x 4 with Holes
×4
Technic, Brick 1 x 8 with Holes
Technic, Brick 1 x 8 with Holes
×6
Technic, Brick 1 x 8 with Holes
Technic, Brick 1 x 8 with Holes
×2
Technic, Brick 1 x 16 with Holes
Technic, Brick 1 x 16 with Holes
×2
Technic, Axle  4L
Technic, Axle 4L
×3
Technic, Axle  6L
Technic, Axle 6L
×4
Technic, Axle  8L
Technic, Axle 8L
×2
Technic, Plate 2 x 4 with 3 Holes
Technic, Plate 2 x 4 with 3 Holes
×2
Plate 1 x 4
Plate 1 x 4
×4
Plate 1 x 4
Plate 1 x 4
×4
Plate 1 x 4
Plate 1 x 4
×2
Technic Bush
Technic Bush
×10
Technic, Axle 10L
Technic, Axle 10L
×2
Technic, Plate 2 x 8 with 7 Holes
Technic, Plate 2 x 8 with 7 Holes
×2
Technic, Gear Rack 1 x 4
Technic, Gear Rack 1 x 4
Technic, Axle  1L with Pin without Friction Ridges with Round Hole
Technic, Axle 1L with Pin without Friction Ridges with Round Hole
×6
Plate 2 x 6
Plate 2 x 6
×2
Technic, Brick 1 x 6 with Holes
Technic, Brick 1 x 6 with Holes
×2
Technic, Brick 1 x 12 with Holes
Technic, Brick 1 x 12 with Holes
×2
Technic, Gear 14 Tooth Bevel Thin
Technic, Gear 14 Tooth Bevel Thin
×2
Technic Wedge Belt Wheel (Pulley)
Technic Wedge Belt Wheel (Pulley)
Technic, Steering Arm with 2 Pin 1/4, Pin Hole, and Axle Hole
Technic, Steering Arm with 2 Pin 1/4, Pin Hole, and Axle Hole
×2
Technic, Plate 1 x 6 with Toothed Ends
Technic, Plate 1 x 6 with Toothed Ends
×3
Technic, Plate 1 x 4 with Toothed Ends
Technic, Plate 1 x 4 with Toothed Ends
×3
Technic Bush 1/2 Toothed with 4 Interior Ridges
Technic Bush 1/2 Toothed with 4 Interior Ridges
×2
Technic, Pin with Long Friction Ridges
Technic, Pin with Long Friction Ridges
×8
Pneumatic Cylinder with 1 Inlet Medium (48mm)
Pneumatic Cylinder with 1 Inlet Medium (48mm)
Pneumatic Distribution Block 2 x 4 with Non-return Valve
Pneumatic Distribution Block 2 x 4 with Non-return Valve
Pneumatic Switch with Top Studs
Pneumatic Switch with Top Studs
Pneumatic Pump First Version
Pneumatic Pump First Version
Hose, Pneumatic 4mm D.  50L / 40.0cm
Hose, Pneumatic 4mm D. 50L / 40.0cm
Hose, Pneumatic 4mm D.  76L / 60.8cm
Hose, Pneumatic 4mm D. 76L / 60.8cm
Technic, Gear 24 Tooth with 3 Axle Holes
Technic, Gear 24 Tooth with 3 Axle Holes
×2

Common questions about Building Set

How much is LEGO Building Set (8040-1) worth?

Building Set sells for an average of $23.88 used and $117.94 new/sealed on BrickLink based on 6 months of completed sales. As a retired set, prices tend to hold steady or appreciate over time, especially for complete sets with original packaging. Actual prices vary with completeness — missing minifigures or key parts will lower the value.

Is LEGO Building Set (8040-1) retired?

Yes, Building Set was released in 1984 and has been retired from retail for several years. Retired LEGO sets are only available on the secondary market through BrickLink, eBay, or other resale platforms.

How do I check if my Building Set set is complete?

Use the parts list on this page to check every piece. For the minifigures specifically, you can use the brick'em scanner to identify each figure from a photo and confirm it matches what should be in this set. Missing pieces can be individually sourced on BrickLink.

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