LEGO Sentai Fortress 7709-1
LEGO Sentai Fortress (7709-1) is worth about $365 on the secondary market today, against a $158 retail price. It has 1,448 pieces, belongs to the Exo-Force theme and was released in 2006. This set has retired — LEGO no longer produces it, so supply is fixed and prices are set entirely by the resale market.
- Set number
- 7709-1
- Theme
- Exo-Force
- Year
- 2006
- Pieces
- 1,448
- Minifigures
- 8
- RRP
- $158
- Market value
- $365
- Used value
- $173
- Released
- 2006
- Retirement
- Retired in 2007
Minifigures in LEGO Sentai Fortress
Sentai Fortress value by year
From $139 in 2016 to $370 in 2026 so far: +167%. Its highest year was 2026, at $370.
| Year | Value | Change |
|---|---|---|
| 2026 (so far) | $370 | +21.0% |
| 2025 | $306 | +0.4% |
| 2024 | $305 | +1.5% |
| 2023 | $300 | +18.9% |
| 2022 | $252 | −9.5% |
| 2021 | $279 | +21.5% |
| 2020 | $229 | −10.4% |
| 2019 | $256 | +13.3% |
| 2018 | $226 | +10.4% |
| 2017 | $205 | +47.6% |
| 2016 | $139 | — |
Median of each year's market prices, sealed, in US dollars.
What you are paying for
Its 7 priced minifigures are worth about $35 together, roughly 10% of the set's value — low for sets with minifigures, so the value is in the sealed set rather than the figures (typically 24%).
Frequently asked questions
How much is LEGO Sentai Fortress (7709-1) worth?
LEGO Sentai Fortress is worth approximately $365 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Sentai Fortress retired?
Yes — Sentai Fortress (7709-1) 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 Sentai Fortress gone up in value?
Yes. Sentai Fortress launched at $158 and now trades around $365, an increase of 130.8%. See the price history chart for how it got there.
What is the price per piece for Sentai Fortress?
At its $158 retail price across 1,448 pieces, Sentai Fortress works out to about $0.109 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Sentai Fortress a good investment?
Sentai Fortress currently trades 130.8% above its $158 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 Sentai Fortress so expensive?
Sentai Fortress was released in 2006 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.