1. Sets
  2. 1984
  3. Duplo
  4. Supplementary

LEGO 1984 / Duplo / Supplementary Sets

In 1984, LEGO released 2 Duplo Supplementary sets, all of these sets have been retired. For that year, the total price of all retail sets cost $23, today those sets are valued around $60, a growth of 160%.
Most valuable 1984 LEGO Duplo Supplementary set
2309 Supplementary Set $32.48
Highest growth 1984 Duplo Supplementary set
2307 Supplementary Set +173.27%
2 sets

2307 Supplementary Set

Theme / Subtheme Duplo / Supplementary
Year 1984
Pieces 18
Availability Retired
2307 LEGO Duplo Supplementary Set
Retail $9.99
Value $27.30
Growth  +173.3%
Annual growth 2.4%

2309 Supplementary Set

Theme / Subtheme Duplo / Supplementary
Year 1984
Pieces 25
Availability Retired
2309 LEGO Duplo Supplementary Set
Retail $12.99
Value $32.48
Growth  +150.0%
Annual growth 2.2%

Year Pricing

Retail
$22.98   (for all 2 sets)
New/Sealed
Value
$59.78
Growth
+160.14%
Annual growth
+2.24%
Used
Value
$49.62

Community Stats

The following are the top 2 most owned 1984 Duplo Supplementary sets by LEGO collectors.
#1Supplementary Set
#2Supplementary Set

About LEGO Duplo Supplementary

LEGO Duplo Supplementary sets are additional sets of bricks and pieces designed to complement existing LEGO Duplo sets. These sets often include specialized pieces like windows, doors, and unique characters or accessories, expanding the creative possibilities for young builders and encouraging imaginative play.
1984 LEGO Sets
1984 cemented Castle’s identity with the debut of two enduring factions—the lion-badged Crusaders and the Black Falcons—bringing rival heraldry, fortified keeps, and standardized knight equipment. Space and Town sustained broad annual waves, and Trains added accessories that improved 12V layouts and operations.