LEGO ROI Calculator
What you'll actually clear on a set after marketplace fees and shipping — the number that tells you whether a flip is worth it.
Popular sets — run one instantly
Why use this
Real margin, not guesswork
Marketplace fees and shipping come straight off the top, so you see what you actually keep — not a fantasy sticker price.
Know your break-even
See the price you need to sell at to walk away even, before you ever commit to a buy.
Any set, totally free
Works on every set we track, no signup. Saving calcs and target-price alerts live in Brickfolio.
Frequently asked
What fees does it include?
The marketplace final-value fee, payment processing, and an estimated shipping cost based on the box size and a typical US destination. You can switch marketplaces and edit shipping.
Where does the value come from?
Real, recent sold prices for the set in sealed condition — what it actually sells for, not an inflated estimate.
Is it really free?
Yes, no signup. Saving calculations and getting alerts when a set hits your target price are part of the paid Brickfolio.