LEGO Kai's Mech Jet 71707-1
LEGO Kai's Mech Jet (71707-1) is worth about $60 sealed (retail $24). Retired 2021 · 217 pieces · 2020 Ninjago. Track its value and price history.
Awesome toy plane and mech with 2 minifigures for race action!
- Set number
- 71707-1
- Theme
- Ninjago
- Subtheme
- Prime Empire
- Year
- 2020
- Pieces
- 217
- Minifigures
- 2
- RRP
- $24
- Market value
- $60
- Used value
- $15
- Released
- 2020
- Retirement
- Retired in 2021
Minifigures in LEGO Kai's Mech Jet
LEGO Kai's Mech Jet at LEGO: release to today
- Nov 9, 2026: Retired at LEGO Poland
- Nov 9, 2026: Retired at LEGO Sweden
- Nov 7, 2026: Retired at LEGO Ireland
- Nov 6, 2026: Retired at LEGO Spain
- Nov 6, 2026: Retired at LEGO France
- Nov 6, 2026: Retired at LEGO UK
- Nov 6, 2026: Retired at LEGO Netherlands
- Nov 6, 2026: Retired at LEGO Germany
- 2020: released
What LEGO.com showed, checked daily in the US and eight European stores.
Kai's Mech Jet value by year
From $21 in 2020 to $60 today: +192%. Its highest year was 2026, at $49.
| Year | Value | Change |
|---|---|---|
| Today | $60 | +38.5% |
| 2026 (so far) | $49 | +13.0% |
| 2025 | $43 | +35.7% |
| 2024 | $32 | +11.9% |
| 2023 | $29 | +24.0% |
| 2022 | $23 | +11.6% |
| 2021 | $21 | +0.5% |
| 2020 | $21 | — |
Median of each year's market prices, sealed, in US dollars.
What you are paying for
Its 2 priced minifigures are worth about $6 together, roughly 11% of the set's value — low for Ninjago sets, so the value is in the sealed set rather than the figures (typically 44%).
Frequently asked questions
How much is LEGO Kai's Mech Jet (71707-1) worth?
LEGO Kai's Mech Jet is worth approximately $60 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Kai's Mech Jet retired?
Yes — Kai's Mech Jet (71707-1) has been retired by LEGO and is no longer in production. Retired sets have fixed supply, which is why their prices are driven purely by the resale market.
Has LEGO Kai's Mech Jet gone up in value?
Yes. Kai's Mech Jet launched at $24 and now trades around $60, an increase of 149.8%. See the price history chart for how it got there.
What is the price per piece for Kai's Mech Jet?
At its $24 retail price across 217 pieces, Kai's Mech Jet works out to about $0.111 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Kai's Mech Jet a good investment?
Kai's Mech Jet currently trades 149.8% above its $24 retail price, and it is retired, so no new supply is entering the market. Past performance is not a prediction — condition, packaging and how long you hold all affect what a set actually sells for. BrickStats reports the numbers rather than giving investment advice.
Why is LEGO Kai's Mech Jet so expensive?
Kai's Mech Jet was released in 2020 and has since retired. Once LEGO stops producing a set, the only supply is what is already in circulation, so sealed copies in good condition compete for a shrinking pool of stock. That scarcity, not the parts, is what moves the price.