LEGO 4.5V Reversible Power Unit 107-3
LEGO 4.5V Reversible Power Unit (107-3) is estimated at about $364 sealed as of Sep 2026 (retail $11). Retired · 16 pieces · 1971 Samsonite.
- Set number
- 107-3
- Theme
- Samsonite
- Subtheme
- Model Maker
- Year
- 1971
- Pieces
- 16
- Minifigures
- 0
- RRP
- $11
- Market value
- $364 (Estimate, Sep 2026)
- Used value
- $25
- Retirement
- Retired
Frequently asked questions
How much is LEGO 4.5V Reversible Power Unit (107-3) worth?
LEGO 4.5V Reversible Power Unit is worth approximately $364 on the secondary market today, based on current listings and completed sales. BrickStats updates this value daily.
Is LEGO 4.5V Reversible Power Unit retired?
Yes — 4.5V Reversible Power Unit (107-3) 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 4.5V Reversible Power Unit gone up in value?
Yes. 4.5V Reversible Power Unit launched at $11 and now trades around $364, an increase of 3228.5%. See the price history chart for how it got there.
What is the price per piece for 4.5V Reversible Power Unit?
At its $11 retail price across 16 pieces, 4.5V Reversible Power Unit works out to about $0.684 per piece. Collectors often use price per piece to judge whether a set is good value.
Is LEGO 4.5V Reversible Power Unit a good investment?
4.5V Reversible Power Unit currently trades 3228.5% above its $11 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 4.5V Reversible Power Unit so expensive?
4.5V Reversible Power Unit was released in 1971 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.