LEGO Message Decoder 6831-1
LEGO Message Decoder (6831-1) is worth about $172 on the secondary market today, against a $8 retail price. It has 34 pieces, belongs to the Space theme and was released in 1989. This set has retired — LEGO no longer produces it, so supply is fixed and prices are set entirely by the resale market.
- Set number
- 6831-1
- Theme
- Space
- Subtheme
- Space Police
- Year
- 1989
- Pieces
- 34
- Minifigures
- 1
- RRP
- $8
- Market value
- $172
- Used value
- $10
- Retirement
- Retired
Minifigures in LEGO Message Decoder
Message Decoder value by year
From $57 in 2016 to $177 in 2026 so far: +207%. Its highest year was 2024, at $178.
| Year | Value | Change |
|---|---|---|
| 2026 (so far) | $177 | +1.1% |
| 2025 | $175 | −2.2% |
| 2024 | $178 | +10.1% |
| 2023 | $162 | −6.3% |
| 2022 | $173 | +30.9% |
| 2021 | $132 | +93.3% |
| 2020 | $68 | +8.7% |
| 2019 | $63 | −6.6% |
| 2018 | $67 | +15.6% |
| 2017 | $58 | +1.4% |
| 2016 | $57 | — |
Median of each year's market prices, sealed, in US dollars.
What you are paying for
Its 1 priced minifigure is worth about $14 together, roughly 8% of the set's value — about typical for Space sets (typically 11%).
Frequently asked questions
How much is LEGO Message Decoder (6831-1) worth?
LEGO Message Decoder is worth approximately $172 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Message Decoder retired?
Yes — Message Decoder (6831-1) 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 Message Decoder gone up in value?
Yes. Message Decoder launched at $8 and now trades around $172, an increase of 2043.9%. See the price history chart for how it got there.
What is the price per piece for Message Decoder?
At its $8 retail price across 34 pieces, Message Decoder works out to about $0.235 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Message Decoder a good investment?
Message Decoder currently trades 2043.9% above its $8 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 Message Decoder so expensive?
Message Decoder was released in 1989 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.