LEGO Train Connection Wire 10078-1
LEGO Train Connection Wire (10078-1) is estimated at about $52 sealed as of Sep 2026 (retail $9). Retired · 1 pieces · 2003 Trains.
- Set number
- 10078-1
- Theme
- Trains
- Subtheme
- 9V
- Year
- 2003
- Pieces
- 1
- Minifigures
- 0
- RRP
- $9
- Market value
- $52 (Estimate, Sep 2026)
- Used value
- $21
- Retirement
- Retired
Train Connection Wire value by year
From $12 in 2016 to $52 (Estimate, Sep 2026): +323%. Its highest year was 2023, at $70.
| Year | Value | Change |
|---|---|---|
| Estimate, Sep 2026 | $52 | +17.4% |
| 2026 (so far) | $43 | −1.8% |
| 2025 | $44 | −25.5% |
| 2024 | $59 | −15.8% |
| 2023 | $70 | +22.4% |
| 2022 | $58 | −11.0% |
| 2021 | $65 | +3.7% |
| 2020 | $62 | +93.2% |
| 2019 | $32 | −9.1% |
| 2018 | $36 | +25.9% |
| 2017 | $28 | +129.6% |
| 2016 | $12 | — |
Median of each year's market prices, sealed, in US dollars.
Frequently asked questions
How much is LEGO Train Connection Wire (10078-1) worth?
LEGO Train Connection Wire is worth approximately $52 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO Train Connection Wire retired?
Yes — Train Connection Wire (10078-1) 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 Train Connection Wire gone up in value?
Yes. Train Connection Wire launched at $9 and now trades around $52, an increase of 477.5%. See the price history chart for how it got there.
What is the price per piece for Train Connection Wire?
At its $9 retail price across 1 pieces, Train Connection Wire works out to about $8.990 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO Train Connection Wire a good investment?
Train Connection Wire currently trades 477.5% above its $9 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 Train Connection Wire so expensive?
Train Connection Wire was released in 2003 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.