Manage your LEGO collection like an investor.
BrickLink for market prices. Brickset for retail prices and retirement dates. Cault combines both and calculates your ROI in real time1 — no manual searching.
Market price
1 124 €
UCS Millennium Falcon · Sealed
Avg ROI
+88 %
on sealed retired sets
Brickset data
23 000+
sets referenced
Retired sets
✓
Status shown on every set
Investment
Why LEGO gains in value.
Sets are retired
Every LEGO set is eventually retired. Once discontinued, supply dwindles and secondary prices rise. Some sealed sets double in value within 2 years of retirement.
+60% on average
on sealed sets, 2 years post-retirement
Adult demand (AFOL)
Adult Fans of LEGO represent a growing share of buyers. They seek rare, sealed, limited-edition sets — fuelling a robust secondary market.
30 %+
of LEGO buyers are adults
Timeless IPs
Star Wars, Harry Potter, Technic, Icons — licences that never expire. These themes sustain demand over the long term.
75192
Millennium Falcon: +88% in 5 years
How it works
How Cault tracks your LEGO sets.
Two complementary sources — combined into one clear view.
The price collectors actually pay.
BrickLink is the world's largest LEGO marketplace. Cault queries its API to get the current market price for every set, based on your exact condition.
- Sealed price (MISB)
- New without box price
- Used price
- Updated every 48h
The official LEGO price and key dates.
Brickset references all LEGO sets with their LEGO.com retail prices (DE and US), launch dates, and above all retirement dates — the most valuable data for anticipating a price rise.
- Retail price LEGO.com DE & US
- Official launch date
- Expected retirement date
- ✓ Retired status displayed
The combination no other tool offers: your purchase price + LEGO.com retail + BrickLink market price = a ROI calculated in real time1, per set, per condition.
Conditions
Each condition has its price.
Cault adapts the BrickLink query to your actual condition. A sealed set gets the sealed price, not an imprecise average.
Sealed (MISB)
Highest priceOriginal box intact, never opened. The ideal condition for investment. Highest market price.
Tip: store the box in a dry place away from light.
New / Like new
Mid-range priceOpened but complete and in excellent condition. No damaged box, all pieces present. Lower price than sealed.
Tip: keep the piece bags and instructions.
Used
Reduced priceBuilt or disassembled, with signs of wear. Lower secondary price, but still an investment if the set is rare.
Tip: clean the pieces before selling to maximise value.
Preview
Your LEGO sets in Cault.
UCS Millennium Falcon
#75192 · Sealed
Luke Skywalker Helmet
#75327 · Sealed
Gryffindor House Banner
#76409 · Open
Pirates of Barracuda Bay
#21322 · Sealed
Start tracking your LEGO sets today.
Free. 2-minute setup. Your first ROI calculated as soon as you add your first item.