1. Sets
  2. Ninjago
71707 LEGO Ninjago Kai's Mech Jet thumbnail image

71707 LEGO Ninjago Kai's Mech Jet
Images 6Description 
71707 LEGO Ninjago Kai's Mech Jet
  • Kai's Mech Jet thumbnail
  • Kai's Mech Jet thumbnail
  • Kai's Mech Jet thumbnail
  • Kai's Mech Jet thumbnail
  • Kai's Mech Jet thumbnail
  • Kai's Mech Jet thumbnail

LEGO 71707 Kai's Mech Jet is a Ninjago set valued at $49 for new and sealed sets, up 145% from an original retail price of $19.99. The set retired in September 2021 with annual appreciation averaging 15.66% since. Used copies are valued between $15 and $22 depending on condition. Secondary market prices for new and sealed sets typically fall between $45 and $59.

Set Value (New/Sealed)

This chart represents the current new/sealed value of the set Kai's Mech Jet since September 2021. Very high accuracy
LEGO 71707 Kai's Mech Jet is a Ninjago Prime Empire set released in 2020, containing 217 pieces and 2 minifigures. It builds a red ninja mech that can be rebuilt into a jet, aligning with the Prime Empire video-game setting from the TV series. The set includes Kai and Richie minifigures and a Key-Tana accessory.

A new and sealed Kai's Mech Jet is currently valued at around $49, with annual growth of about 10.5% that is expected to level off to around 8.0% in the coming year, making it a solid investment. The average used price is $18 for those in good overall condition. The 2 included minifigs account for approximately 19% of the set's total value. New and sealed listings currently range from $45 to $60. The set was available for 20 months, from January 2020 to September 2021.
All regions

For Sale (New/Sealed)

 (US) NINJAGO: Kai's Mech Jet (71707), NEW, COMPLETE and SEALED in box
BrickEconomy Choice
$40.00
(CA) Ninjiago Set 71707 Kai's Mech Jet Brand New $42.89
-12.5%
(US) NINJAGO: Kai's Mech Jet (71707) BNIB $44.98
-8.2%
(US) NINJAGO: Kai's Mech Jet (71707) New $45.00
-8.1%
(US) NINJAGO Kai's Mech Jet (71707) Complete Set 217 Pieces 7+ 2-in-1 Digi Kai $45.00
-8.1%
(US) Ninjago KAI'S MECH JET Set 71707 Sealed Retired $45.00
-8.1%
(US) New In Sealed Box $47.95
-2.1%
(US) NINJAGO: Kai's Mech Jet (71707) FACTORY SEALED $48.77
-0.4%
(US) NINJAGO Kai's Mech Jet New Sealed 71707 $49.95
+2.0%
(HK) BrickLink store Funny_bricks $51.05
+4.2%
(US) Ninjago Kai's Mech Jet Set #71707 New Unopened $52.50
+7.2%
(US) 71707 KAI'S MECH JET lego legos set ninjago RICHIE robot air plane 2 in 1 NEW $52.99
+8.2%
(CA) Ninjiago Set#71707 Kai's Mech Jet (Brand New Factory Seal) $59.44
+21.3%
(US) NINJAGO (71707) KAI'S MECH JET - 217 Pieces (New In Package) $59.95
+22.4%
Show 2 more listings

Sales Distribution (Last 90 Days)

This chart shows the distribution of sales for the past three months of new/sealed 71707 Kai's Mech Jet.

Sale Trends

This chart shows the sales trends (number sold) of new/sealed 71707 Kai's Mech Jet.

More sets in Ninjago

71722 Skull Sorcerer's Dungeons

Theme Ninjago
Year 2020
Pieces / Minifigs 1,171 / 8
Availability Retired
71722 LEGO Ninjago Skull Sorcerer's Dungeons
Retail $99.99
Value $247.16
Growth  +147.2%
Annual growth 16.0%

71721 Skull Sorcerer's Dragon

Theme Ninjago
Year 2020
Pieces / Minifigs 1,016 / 7
Availability Retired
71721 LEGO Ninjago Skull Sorcerer's Dragon
Retail $79.99
Value $207.87
Growth  +159.9%
Annual growth 18.1%

71720 Fire Stone Mech

Theme Ninjago
Year 2020
Pieces / Minifigs 968 / 5
Availability Retired
71720 LEGO Ninjago Fire Stone Mech
Retail $69.99
Value $114.85
Growth  +64.1%
Annual growth 10.6%

71719 Zane's Mino Creature

Theme Ninjago
Year 2020
Pieces / Minifigs 616 / 4
Availability Retired
71719 LEGO Ninjago Zane's Mino Creature
Retail $49.99
Value $75.71
Growth  +51.5%
Annual growth 6.9%

71717 Journey to the Skull Dungeons

Theme Ninjago
Year 2020
Pieces / Minifigs 401 / 4
Availability Retired
71717 LEGO Ninjago Journey to the Skull Dungeons
Retail $29.99
Value $72.31
Growth  +141.1%
Annual growth 14.4%

71718 Wu's Battle Dragon

Theme Ninjago
Year 2020
Pieces / Minifigs 321 / 2
Availability Retired
71718 LEGO Ninjago Wu's Battle Dragon
Retail $19.99
Value $55.47
Growth  +177.5%
Annual growth 15.3%

71703 Storm Fighter Battle

Theme Ninjago
Year 2020
Pieces / Minifigs 165 / 3
Availability Retired
71703 LEGO Ninjago Storm Fighter Battle
Retail $29.99
Value $33.35
Growth  +11.2%
Annual growth 4.3%

70685 Spinjitzu Burst Cole

Theme Ninjago
Year 2020
Pieces / Minifigs 48 / 1
Availability Retired
70685 LEGO Ninjago Spinjitzu Burst Cole
Retail $9.99
Value $29.99
Growth  +200.2%
Annual growth 16.1%

70686 Spinjitzu Burst Kai

Theme Ninjago
Year 2020
Pieces / Minifigs 48 / 1
Availability Retired
70686 LEGO Ninjago Spinjitzu Burst Kai
Retail $9.99
Value $27.04
Growth  +170.7%
Annual growth 14.2%

70687 Spinjitzu Burst Lloyd

Theme Ninjago
Year 2020
Pieces / Minifigs 48 / 1
Availability Retired
70687 LEGO Ninjago Spinjitzu Burst Lloyd
Retail $9.99
Value $20.72
Growth  +107.4%
Annual growth 10.1%

892059 Kai

Theme Ninjago
Year 2020
Pieces / Minifigs 2 / 1
Availability Retired
892059 LEGO Ninjago Kai
promotional
Value $4.02
Annual growth 5.3%

My Collection

Kai's Mech Jet Reviews

46 reviews
4.7
Collectors
Investors
Brickset
“Kai’s Mech Jet is perfect for what it is, a 2 in 1 vehicle with bright coloring. The minifigures are fine, but not a reason to buy the set and there are very few rare parts. The half dozen stickers will likely deter some, but that is to be expected for a £19.99 or $19.99... More set. However, for someone looking for a smaller sprightly set, Kai’s Mech Jet is certainly a sensible choice.”
Full review at brickset.com
BrickEconomy Member Review
“Kai's Mech stands out as a hidden gem among Ninjago sets from the Prime Empire wave. Its improved cockpit design, clever use of transparent elements, and the integration of health bar details enhance its unique Prime Empire aesthetic. The standout feature, however, is the two-in-one functionality with an impressive jet alternate build, making it a versatile and underrated set.”
 

About Ninjago

LEGO Ninjago, also known as Ninjago: Masters of Spinjitzu, theme was introduced in 2011 and included sets that are based off of original storylines, a TV series and The LEGO Ninjago Movie, a movie based on the theme. The main premise of the Ninjago universe is based around six teenage Ninja, Kai, Jay, Cole, Zane, Nya, and Lloyd, who have been trained by their master Sensei Wu, fighting forces of evil to protect the land of Ninjago. The ninjas use a LEGO inspired fighting style known as Spinjitzu where the fighters spin around and draw on their elemental strengths to become tornadoes of energy and each of the main protagonist characters is aligned to a particular element.
Summary
Ninjago Kai's Mech Jet set 71707 was released on January 2, 2020, retailing for $20, it has since been retired. New, unopened sets are valued at $49, while used sets sell around $18.
Read more
Awesome toy plane and mech with 2 minifigures for race action!
Kai’s Mech Jet (71707) is the ideal birthday gift for kids who love LEGO® NINJAGO® Mechs and Toy Planes. This is a 2-in-1 toy playset, which increases building and play possibilities. Kids can choose for it to be a toy jet plane or a mech toy for exciting adventures in Prime Empire with NINJAGO Kai. The fun new way to build LEGO gifts Instructions PLUS offers an interactive guide to build this toy jet and mech toy and makes it even more fun. Available in the free LEGO Life app; it has zoom and rotate viewing tools to help youngsters build independently. The perfect guide to create this toy playset.

This building set includes a NINJAGO® Mech that rebuilds into a toy plane, 2 minifigures: NINJAGO® Kai and Richie, and a Key-Tana. Together they will fuel kids' creativity as they re-enact scenes from Prime Empire.
Description provided by LEGO©