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Diesel Freight Train Set, battery

7720-1·Trains·1980·3 minifigs·99 parts

Used Avg

$194.74

New Avg

$531.25

Add to your inventory Scan the minifigs

About Diesel Freight Train Set, battery

Diesel Freight Train Set, battery (7720-1) is a LEGO Trains set released in 1980, currently averaging $194.74 used on BrickLink. It comes with 3 minifigures worth a combined $5.99. The set has retired from retail, so secondary market is the only option. The full parts inventory runs 99 pieces.

Part-out value

The minifigures make up only 3% of this set's value ($5.99 out of $194.74). 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 $531.25 vs $194.74 used — a 173% premium. If you have this set new in sealed box (NISB), price it accordingly.
This is a vintage set (1980). Condition of the box and instructions significantly affects value. A complete set with original box and instructions can sell for well above the average.

Minifigures in Diesel Freight Train Set, battery (3)

Shirt with 6 Buttons - Blue, Blue Legs, Red Construction Helmet

but011$1.82

Shirt with 6 Buttons - Blue, Blue Legs, Red Hat

but020$1.83

Suit with 3 Buttons Blue - Blue Legs, Red Hat

trn068$2.34

Parts (99)

Paper Information Note, Battery Waggon Leaflet - 101583

Plate, Modified 2 x 2 with Red Wheels with Black Tires 21mm D. x 9mm Offset Tread Medium (122c01/ 4084)

×2

Brick 2 x 4

Brick 2 x 2 without Inside Supports

×2

Brick 1 x 2

×11

Brick 1 x 2

×8

Brick 1 x 2

×4

Brick 1 x 2

×2

Brick 1 x 1

×8

Brick 1 x 1

×14

Brick 1 x 6

×8

Brick 1 x 4

×2

Brick 1 x 4

×7

Brick 1 x 4

Plate 2 x 4

Plate 2 x 3

×2

Plate 2 x 3

×2

Plate 2 x 2

×6

Plate 1 x 2

×4

Plate 1 x 2

×2

Plate 1 x 1

×4

Plate 1 x 1

×8

Plate 6 x 16

Plate 6 x 12

×2

Plate 4 x 6

×4

Plate 4 x 6

Plate 6 x 10

Plate 4 x 8

Plate 6 x 8

Slope 45 2 x 4

×2

Slope 45 2 x 2

×2

Slope 45 2 x 2

×2

Brick, Modified 1 x 2 with Cable Holding Cutout

Hinge Plate 2 x 4

Train Direction Switch - 4.5V 2 x 3

Train, Track Rail Straight 16L with Slots

×8

Train, Track Rail Curved Outside with Slots

×16

Train, Track Rail Curved Inside with Slots

×16

Slope 33 3 x 4

×11

Slope 33 3 x 2

×2

Vehicle, Digger Bucket Arm, Small - 2 x 6 x 2

Brick, Modified 1 x 2 with Digger Bucket Arm Holder

Vehicle, Digger Bucket Smooth 3 x 5 x 1 1/3 with Digger Bucket Arm Hinge

Train Battery Box Car with Two Contact Holes, Red Switch Lever, Blue and Red Magnets, Red Wheels, and Light Gray Roof

Plate 1 x 8

×2

Plate 1 x 8

×4

Brick, Modified 1 x 1 x 2 with Shutter Holder

×4

Shutter for Window 1 x 2 x 2

×4

Plate 1 x 3

×4

Plate 1 x 3

×4

Fence 1 x 4 x 1 Lattice

×8

Slope, Inverted 45 2 x 1

×16

Plate 1 x 6

×2

Plate 1 x 6

×15

Plate 1 x 4

×5

Plate 1 x 4

×4

Plate 1 x 4

×2

Plate 1 x 4

×4

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

×8

Plate 2 x 6

×5

Plate 2 x 6

×4

Vehicle, Steering Stand 1 x 2 with Black Steering Wheel

Plate 2 x 10

×2

Window 1 x 4 x 3

×4

Shutter for Window 1 x 2 x 3

×8

Train Buffer Beam

×4

Train Coupling with Pin

×6

Window 1 x 4 x 3 Train - Hollow Studs

Glass for Train Window 1 x 4 x 3

Window 1 x 2 x 3 Train

Glass for Train Window 1 x 2 x 3

Brick, Modified 1 x 1 with Headlight

×8

Brick, Modified 1 x 1 with Headlight

×2

Plate, Round 1 x 1, 2 on Sprue

×3

Plate, Round 1 x 1, 2 on Sprue

×3

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

×2

Bar 1 x 4 x 2 with Open Studs

Train, Track Sleeper Plate 2 x 8 without Cable Grooves

×40

Ladder 1 1/2 x 2 x 2

×2

Train Base 6 x 16 Cutout

Brick, Modified 2 x 4 with Red Wheels, Train Spoked Small (23mm D.) and Red Pins (4180 / wheel3 / 2344)

×4

Door 1 x 4 x 5 Train Left, Thin Support at Bottom

×2

Door 1 x 4 x 5 Train Right, Thin Support at Bottom

×2

Glass for Train Door with Lip on Top and Bottom

×4

Window 1 x 2 x 2 with Fixed Trans-Clear Glass

×4

Magnet Cylindrical

×6

Sticker Sheet for Set 7720 - (191895)

Train Level Crossing Center Rail Cap Insert 2 x 14 x 2/3

Train Level Crossing Base

Train Level Crossing Gate Type 1, Assembly with Blue Base & Red Handle (Right)

Train Level Crossing Gate Type 1, Assembly with Blue Base & Red Handle (Left)

Electric, Wire 12V / 4.5V with 2 Leads, 28 Studs Long with 2 Light Gray Electric, Connector, 2-Way Male Squared Narrow Long without Center Post

Train Buffer Single

×4

Train Signal Circuit-Breaker Bar

Train Wheel Spoked for Motor with Light Gray Train Rim for 4.5V & 12V Locomotive Wheels (wheel2a / trainrim)

×4

Electric, Motor 4.5V Type C 12 x 4 x 3 1/3 (Train)

Train Signal Post

Common questions about Diesel Freight Train Set, battery

How much is LEGO Diesel Freight Train Set, battery (7720-1) worth?

Diesel Freight Train Set, battery sells for an average of $194.74 used and $531.25 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 7720-1?

This set includes 3 minifigures: Shirt with 6 Buttons - Blue, Blue Legs, Red Construction Helmet ($1.82), Shirt with 6 Buttons - Blue, Blue Legs, Red Hat ($1.83), Suit with 3 Buttons Blue - Blue Legs, Red Hat ($2.34). The minifigures have a combined BrickLink value of $5.99. Each figure is linked above with individual pricing if you're looking to buy or sell specific characters.

Is it worth parting out LEGO Diesel Freight Train Set, battery?

The minifigures make up about 3% of the set value ($5.99 out of $194.74). 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 Diesel Freight Train Set, battery (7720-1) retired?

Yes, Diesel Freight Train Set, battery was released in 1980 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. At its current price point, it has appreciated since retirement.

How do I check if my Diesel Freight Train Set, battery set is complete?

Use the parts list on this page to check every piece and all 3 minifigures. 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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