LEGO 3850004 Biplane is a Exclusive set currently valued at $7 for new and sealed sets. Annual appreciation has averaged 2.46% since release. Used copies are valued between $5 and $6 depending on condition.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Biplane since June 2015. Low accuracy
LEGO 3850004-1 Biplane is an Exclusive Pick a Model set released in 2015, containing 24 pieces. The set was a small aircraft build designed as part of the monthly Pick-a-Model program at LEGO Brand Stores. It was assembled from parts available on the Pick a Brick wall and packaged in a 3-compartment resealable blister pack. Distribution was limited to participating LEGO Brand Store locations through the in-store Pick a Brick promotion. Based on current trends, this set could be valued near $7 within the next year.
Biplane is a rare LEGO set. We have not seen set 3850004-1 available in good/new condition online or in retail stores for over 2 years. Given how hard it is to find, the estimated value in new condition of $6.52 may not reflect its true collectible worth.
There are currently no new/sealed listings available for Biplane at this time.
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Sets in Exclusive / Pick a Model

3850002 Car

Theme / Subtheme Exclusive / Pick a Model
Year 2015
Pieces 40
Availability Retired
3850002 LEGO Pick a Model Car
Retail $4.99
Value $8.92
Growth  +78.8%
Annual growth 5.4%

3850003 Giraffes

Theme / Subtheme Exclusive / Pick a Model
Year 2015
Pieces 36
Availability Retired
3850003 LEGO Pick a Model Giraffes
Retail $4.99
Value $6.52
Growth  +30.7%
Annual growth 2.5%

3850001 Crocodile

Theme / Subtheme Exclusive / Pick a Model
Year 2015
Pieces 30
Availability Retired
3850001 LEGO Pick a Model Crocodile
Retail $4.99
Value ~$4.99

3850006 Jeep

Theme / Subtheme Exclusive / Pick a Model
Year 2015
Pieces 29
Availability Retired
3850006 LEGO Pick a Model Jeep
Retail $4.99
Value ~$4.99

3850005 Panda

Theme / Subtheme Exclusive / Pick a Model
Year 2015
Availability Retired
3850005 LEGO Pick a Model Panda
Retail $4.99
Value $18.58
Growth  +272.3%
Annual growth 7.9%