LEGO 9454 Function Set is a vintage Dacta set from 1992 valued at $70 for new and sealed sets, up 0% from an original retail price of $69.99. Used copies are valued between $57 and $65 depending on condition.

LEGO 9454 Function Set is a Dacta set released in 1992, containing 356 pieces. It focuses on Technic-based mechanism building, supplying elements such as liftarms, axles, pulleys and wedge belt wheels, rubber bands, thin cord, shock absorbers, hinges, and a crane arm component for constructing working models. The assortment supports exploration of motion and mechanical functions through hands-on builds. Based on current trends, this set could be valued near $72 within the next year.
Function Set is considered a classic and collectible LEGO set. Set 9454-1 has not been available for sale online or in retail stores in new or well-preserved condition for quite some time. Complete sets from the 1990s are increasingly difficult to find, and sealed boxes are especially sought after by collectors. Its true market value is likely higher than the current estimate.
There are currently no new/sealed listings available for Function Set at this time.
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Sets in Dacta

9255 Basic Set

Theme / Subtheme Dacta / System
Year 1992
Pieces 177
Availability Retired
9255 LEGO Dacta System Basic Set
Retail $49.99
Value $89.00
Growth  +78.0%
Annual growth 2.1%

9604 Technic and Pneumatic Elements

Theme / Subtheme Dacta / Technic
Year 1992
Pieces 124
Availability Retired
9604 LEGO Dacta Technic and Pneumatic Elements
Retail $36.95
Value $66.97
Growth  +81.2%
Annual growth 2.5%

9876 Large Turntables

Theme / Subtheme Dacta / Technic
Year 1992
Pieces 2
Availability Retired
9876 LEGO Dacta Technic Large Turntables
Retail $8.75
Value $18.52
Growth  +111.7%
Annual growth 3.2%