How to value LEGO sets with your phone
- Open Sparrow Collect and point your camera at the item.
- The app identifies it and asks for the condition options that fit LEGO sets.
- You get a low, mid and high value, with how many prices it rests on and which sources they came from.
Where the prices come from
Values for LEGO sets are built from eBay listings (the sources that delivered prices in the 30 days to 12 October 2026). Each value in the app shows the prices behind it, so you can see what it is based on instead of trusting a single number.
Browse LEGO sets for sale
Current listings (asking prices, not sold prices) on eBay:
These are affiliate links: if you buy after following one, Sparrow Collect may earn a commission from eBay. It costs you nothing extra and does not change the values shown in the app.
Questions collectors ask
How do I check the value of my LEGO sets?
LEGO values depend on whether the set is new/sealed vs. used, whether it is retired, and completeness. Retired sets often appreciate significantly. Scan the set or its barcode with Sparrow Collect for an instant market value from eBay and other marketplace data. For used sets, completeness and box/manual condition affect price. The portfolio dashboard lets you track whether your LEGO collection is gaining or losing value over time.
Sealed vs. opened LEGO — which is worth more?
Sealed LEGO sets are almost always worth more — typically 30-50% more than opened/complete sets, and the gap widens with time. Retired sealed sets are the gold standard for LEGO investing. However, a complete used set with box and instructions still holds significant value, especially for popular themes. Incomplete sets or sets without the box lose 50-70% of their sealed value. Check recent sealed and used prices to understand the gap for your specific sets.
Should I sell or hold my LEGO sets?
Retired LEGO sets tend to appreciate 10-15% per year on average, so holding is often rewarding if you have patience and storage space. The best appreciators are licensed themes (Star Wars, Harry Potter), large display sets, and limited collaborations. If you need cash now, scan with Sparrow Collect and compare current market value against what you paid. Sets still available at retail rarely sell above MSRP.
What should I know before collecting LEGO?
Key things: retired sets appreciate (especially Star Wars, Harry Potter, Modular Buildings), sealed sets are worth more than opened, and LEGO rarely goes on sale at deep discounts. Buy sets you want to build AND sets you want to hold sealed for investment. Store sealed sets in a cool, dry place. Use Sparrow Collect to track values — some retired sets have appreciated 100%+ over 5 years.