LEGO Control Lab Serial Interface & Adapter 9751-1
LEGO Control Lab Serial Interface & Adapter (9751-1) is estimated at about $155 sealed as of Sep 2026. Retired · 2 pieces · 1995 Dacta.
- Set number
- 9751-1
- Theme
- Dacta
- Subtheme
- Technic
- Year
- 1995
- Pieces
- 2
- Minifigures
- 0
- Market value
- $155 (Estimate, Sep 2026)
- Used value
- $153
- Retirement
- Retired
Control Lab Serial Interface & Adapter value by year
From $108 in 2016 to $155 (Estimate, Sep 2026): +43%. Its highest year was 2025, at $146.
| Year | Value | Change |
|---|---|---|
| Estimate, Sep 2026 | $155 | +5.7% |
| 2026 (so far) | $144 | −1.7% |
| 2025 | $146 | +5.7% |
| 2024 | $139 | +10.9% |
| 2023 | $125 | −0.6% |
| 2022 | $126 | −1.8% |
| 2021 | $128 | +4.4% |
| 2020 | $123 | +10.5% |
| 2019 | $111 | −2.8% |
| 2018 | $114 | +1.3% |
| 2017 | $113 | +4.0% |
| 2016 | $108 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Control Lab Serial Interface & Adapter (9751-1) worth?
LEGO Control Lab Serial Interface & Adapter is worth approximately $155 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Control Lab Serial Interface & Adapter retired?
Yes — Control Lab Serial Interface & Adapter (9751-1) 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.
Why is LEGO Control Lab Serial Interface & Adapter so expensive?
Control Lab Serial Interface & Adapter was released in 1995 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.