In 1986, LEGO released 18 Duplo sets across 3 subthemes, all of these sets have been retired. Subthemes for that year included Baby, Building Sets, and Value Packs. For that year, the total price of all retail sets cost $202, today those sets are valued around $2,009.
Most valuable 1986 LEGO Duplo set
2760 House Supplementary Set $304.04
Highest growth 1986 Duplo set
1503 Car Building Set +4597.65%
Largest 1986 LEGO Duplo set
2770 Play House 64 pieces
18 sets

1503 Car Building Set

Theme / Subtheme Duplo / Building Sets
Year 1986
Pieces / Duplo figures 7 / 1
Availability Retired
1503 LEGO Duplo Car Building Set
Retail $2.98
Value $139.99
Growth  +4597.7%
Annual growth 10.3%

1504-2 House Building Set

Theme / Subtheme Duplo / Building Sets
Year 1986
Pieces / Duplo figures 13 / 1
Availability Retired
1504-2 LEGO Duplo House Building Set
Retail $4.99
Value $108.20
Growth  +2068.3%
Annual growth 9.5%

1505 House and Car Building Sets

Theme / Subtheme Duplo / Value Packs
Year 1986
Pieces 20
Availability Retired
1505 LEGO Duplo House and Car Building Sets
Retail $4.98
Value $160.00
Growth  +3112.9%
Annual growth 7.9%

1618 Storage Container

Theme Duplo
Year 1986
Pieces / Duplo figures 47 / 3
Availability Retired
1618 LEGO Duplo Storage Container
Retail $19.99

1926 DUPLO Combination Pack

Theme Duplo
Year 1986
Pieces 6
Availability Retired
1926 LEGO DUPLO Combination Pack
Retail $9.99
Value $210.36
Growth  +2005.7%
Annual growth 7.9%

2014 Oval Rattle

Theme / Subtheme Duplo / Baby
Year 1986
Pieces 1
Availability Retired
2014 LEGO Duplo Baby Oval Rattle
Retail $3.99
Value $12.10
Growth  +203.3%
Annual growth 2.8%

2050 Squirrel Rattle

Theme / Subtheme Duplo / Baby
Year 1986
Pieces 2
Availability Retired
2050 LEGO Duplo Baby Squirrel Rattle
Retail $4.99
Value $13.36
Growth  +167.7%
Annual growth 9.0%

2051 Spin-A-Coaster

Theme / Subtheme Duplo / Baby
Year 1986
Pieces 2
Availability Retired
2051 LEGO Duplo Baby Spin-A-Coaster
Retail $5.99
Value $46.88
Growth  +682.6%
Annual growth 5.3%

2052 Clown Shape Sorter

Theme / Subtheme Duplo / Baby
Year 1986
Pieces 7
Availability Retired
2052 LEGO Duplo Baby Clown Shape Sorter
Retail $6.99
Value $35.95
Growth  +414.3%
Annual growth 4.2%

2057 Rocking Horse Push-Along

Theme / Subtheme Duplo / Baby
Year 1986
Pieces / Duplo figures 2 / 1
Availability Retired
2057 LEGO Duplo Baby Rocking Horse Push-Along
Retail $5.99
Value $65.19
Growth  +988.3%
Annual growth 6.2%

2059 Activity and Bath Toy

Theme / Subtheme Duplo / Baby
Year 1986
Pieces 2
Availability Retired
2059 LEGO Duplo Baby Activity and Bath Toy
Retail $4.99
Value $71.71
Growth  +1337.1%
Annual growth 6.9%

2750 DUPLO Family

Theme Duplo
Year 1986
Pieces / Duplo figures 1 / 6
Availability Retired
2750 LEGO DUPLO Family
Retail $5.99
Value $159.78
Growth  +2567.4%
Annual growth 8.5%

2752 Bedroom

Theme Duplo
Year 1986
Pieces / Duplo figures 28 / 2
Availability Retired
2752 LEGO Duplo Bedroom
Retail $9.99
Value $85.49
Growth  +755.8%
Annual growth 5.0%

2754 Bathroom

Theme Duplo
Year 1986
Pieces / Duplo figures 10 / 1
Availability Retired
2754 LEGO Duplo Bathroom
Retail $3.99
Value $93.22
Growth  +2236.3%
Annual growth 8.2%

2756 Kitchen

Theme Duplo
Year 1986
Pieces / Duplo figures 20 / 1
Availability Retired
2756 LEGO Duplo Kitchen
Retail $14.99
Value $73.94
Growth  +393.3%
Annual growth 3.1%

2758 Living Room

Theme Duplo
Year 1986
Pieces / Duplo figures 29 / 1
Availability Retired
2758 LEGO Duplo Living Room
Retail $8.99
Value $129.45
Growth  +1339.9%
Annual growth 6.9%

2760 House Supplementary Set

Theme Duplo
Year 1986
Pieces 11
Availability Retired
2760 LEGO Duplo House Supplementary Set
Retail $12.99
Value $304.04
Growth  +2240.6%
Annual growth 8.2%

2770 Play House

Theme Duplo
Year 1986
Pieces / Duplo figures 64 / 5
Availability Retired
2770 LEGO Duplo Play House
Retail $69.00
Value $299.60
Growth  +334.2%
Annual growth 3.7%