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Basic Building Set

720-1·LEGO·1985·1 minifig·121 parts

Used Avg

$34.81

New Avg

$222.55

Add to your inventory Scan the minifigs

About Basic Building Set

Basic Building Set (720-1) is a LEGO LEGO set released in 1985, currently averaging $34.81 used on BrickLink. It comes with 1 minifigure worth a combined $1.59. The set has retired from retail, so secondary market is the only option. The full parts inventory runs 121 pieces.

Part-out value

The minifigures make up only 5% of this set's value ($1.59 out of $34.81). The bulk of the value is in the parts or the set being complete. Sell it as a complete set if possible.

Seller notes

Sealed copies sell for $222.55 vs $34.81 used — a 539% premium. If you have this set new in sealed box (NISB), price it accordingly.

Minifigures in Basic Building Set (1)

Plain Black Torso with Black Arms, Blue Legs, Black Hat

pln029$1.59

Parts (121)

Brick 2 x 4

×2

Brick 2 x 4

Brick 2 x 3 without Cross Supports

×2

Brick 2 x 3 without Cross Supports

×2

Brick 2 x 2 without Inside Supports

×5

Brick 2 x 2 without Inside Supports

×2

Brick 2 x 2 without Inside Supports

×2

Brick 1 x 2

×10

Brick 1 x 2

×4

Brick 1 x 2

×6

Brick 1 x 2 with Black Grille with 7 Vertical Lines Pattern

Brick 1 x 1

×16

Brick 1 x 1

×4

Brick 1 x 1

×6

Brick 1 x 1

×4

Brick 2 x 10

Brick 1 x 8

×2

Brick 1 x 8

×2

Brick 1 x 6

×4

Brick 1 x 6

×2

Brick 1 x 6

×6

Brick 1 x 4

×6

Brick 1 x 4

×2

Brick 1 x 4

×4

Plate 2 x 4

×2

Plate 2 x 4

×4

Plate 2 x 2

×2

Plate 2 x 2

×2

Plate 1 x 2

×4

Plate 1 x 2

×4

Plate 1 x 2

×2

Plate 1 x 1

×2

Plate 1 x 1

×2

Plate 1 x 1

Plate 4 x 4

Plate 4 x 6

Plate 6 x 10

×2

Plate 2 x 8

×2

Plate 4 x 8

Slope 45 2 x 4

×4

Slope 45 2 x 3

×4

Slope 45 2 x 2

×4

Slope 45 2 x 1

×4

Slope 45 2 x 1

×4

Slope 45 2 x 4 Double

Slope 45 2 x 2 Double

×2

Brick, Round 1 x 1

×6

Hook Plate, Modified 1 x 2 with Crane Hook Left

Hinge Plate 2 x 4

Plate, Modified 2 x 3 with Hole

×2

Door 1 x 3 x 2 Right

Door 1 x 3 x 2 Left

Plate 1 x 8

×8

Plant, Tree Pine Large 4 x 4 x 6 2/3

Wheel with Split Axle Hole

×4

Tire 24mm D. x 8mm Offset Tread - Interior Ridges

×4

Brick 1 x 3

×8

Brick 1 x 3

×4

Brick 1 x 3

×6

Plate 1 x 3

×2

Plate 1 x 3

×2

Plate 1 x 3

×2

Slope, Inverted 45 2 x 2 with Flat Bottom Pin

×4

Slope, Inverted 45 2 x 2 with Flat Bottom Pin

×4

Slope, Inverted 45 2 x 1

×4

Slope, Inverted 45 2 x 1

×4

Plate 1 x 6

×2

Plate 1 x 6

×2

Turntable 2 x 2 Plate with Light Gray Top (3680 / 3679)

Technic, Brick 1 x 4 with Holes

×4

Technic, Axle 6L

×2

Technic, Axle 8L

×2

Plate 1 x 4

×4

Plate 1 x 4

×2

Plant Flower Stem with Stud and 3 Stems

×2

Plant Flower Small, 4 on Sprue

Technic, Axle 1L with Pin without Friction Ridges with Round Hole

×2

Vehicle, Mudguard 2 x 4 with Arch Smooth

Vehicle, Mudguard 2 x 4 with Arch Studded

Plate, Modified 1 x 2 with 1 Stud without Groove (Jumper)

Plate 2 x 6

×2

Plate 2 x 6

×2

Door 1 x 3 x 1 Right

Door 1 x 3 x 1 Left

Windscreen 2 x 4 x 2

Vehicle, Steering Stand 1 x 2 with Black Steering Wheel

Plate 2 x 10

Window 1 x 4 x 3

×4

Pane for Window 1 x 2 x 3

×4

Glass for Window 1 x 4 x 3

×2

Shutter for Window 1 x 2 x 3

×4

Baseplate 16 x 32

Door 1 x 4 x 5 with 4 Panes

Hinge Brick 1 x 2 Base

Hinge Brick 1 x 2 Top Plate

Brick, Round 2 x 2 with Axle Hole

×4

Plate 6 x 6

Brick, Modified 1 x 1 with Headlight

×2

Brick, Modified 1 x 1 with Headlight

×4

Plate, Round 1 x 1, 2 on Sprue

×2

Minifigure, Utensil Seat / Chair 2 x 2

Plate, Modified 1 x 1 with Light Attachment - Thin Ring

Bar 1 x 4 x 2 with Open Studs

Ladder 1 1/2 x 2 x 2

Windscreen 2 x 6 x 2

Vehicle, Base 4 x 5

Hinge Vehicle Roof 4 x 4

Hinge Vehicle Roof Holder 1 x 4 x 2

Hinge Plate 1 x 2 with 3 Fingers on End (Undetermined Type)

×3

Boat, Mast 2 x 2 x 9 2/3 Bar with Slot on Top and 2 Finger Hinge on Two Sides

Slope 45 2 x 8

×6

Flag 4 x 1 Wave Left

Plate, Modified 1 x 8 with Door Rail

×4

Door Sliding - Type 1

×2

Hinge Tile 1 x 2 1/2 with 2 Fingers on Top

×2

Plate, Modified 2 x 2 with Wheels Holder

×2

Wheel 8mm D. x 6mm with Black Tire 15mm D. x 6mm Offset Tread Small (4624 / 3641)

×4

Vehicle, Digger Bucket 2 x 3 Curved Bottom, Hollow, with 2 Fingers Hinge

String, Cord Thin 75cm

Common questions about Basic Building Set

How much is LEGO Basic Building Set (720-1) worth?

Basic Building Set sells for an average of $34.81 used and $222.55 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.

What minifigures come in LEGO set 720-1?

This set includes 1 minifigure: Plain Black Torso with Black Arms, Blue Legs, Black Hat ($1.59). The minifigures have a combined BrickLink value of $1.59. Each figure is linked above with individual pricing if you're looking to buy or sell specific characters.

Is it worth parting out LEGO Basic Building Set?

The minifigures make up about 5% of the set value ($1.59 out of $34.81). Most of the value is in the complete set package, so selling it whole is likely the better move unless you have buyers lined up for specific figures.

Is LEGO Basic Building Set (720-1) retired?

Yes, Basic Building Set was released in 1985 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 Basic Building Set set is complete?

Use the parts list on this page to check every piece and all 1 minifigure. 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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