Learn CollectORbuild in a few minutes

Everything on CollectORbuild starts with search. Type in a set, a part, or a minifigure. Or open the catalog and narrow it down by theme, year, color, and price. Every item page shows live offers from independent sellers, the lowest price, and whether it's a good deal. The same works for a single part, in every color, with sellers ready to ship. Find anything. That's where it begins.

Want to build a specific set? Start on the build page. Enter the set number. That's the only thing you need. CollectORbuild lays out every part the set needs, in the right colors, and marks what you already own. One click finds the missing pieces across every seller, and builds the cheapest basket with the fewest shipments. Your cart fills itself. Different sellers, one order to review. Complete any set. See it, build it, or sell it.

Your cart can hold items from any number of sellers, all in one place. Change a quantity or remove a lot right here. It updates instantly, with no page reloads. At checkout, choose your address, and shipping is quoted for each seller automatically. You see each seller's total, every fee itemized, and their policies before you agree. Then check out once. You pay each seller directly and securely. One cart. Every seller. One checkout.

Curious what a set is worth? Enter it here and get a value in seconds. It's free. Add the sets and parts you own to build your collection. Record what you paid, and CollectORbuild tracks your gain and loss on every item. Watch your collection's value move over time, like a portfolio for your bricks. And share a clean public showcase of your collection with anyone. Know what it's worth. Show what you've built.

If you sell LEGO, start by applying and reserving your store name. If it's free, it's yours. Connect your payouts so buyers pay you directly, then set your shipping rates and order rules. Here's the part that saves you days. Bring your entire store across in one file, from BrickLink or BrickStore. CollectORbuild reads it, matches every lot to the catalog, and shows you a preview before anything goes live. Confirm, and your listings are live on your own branded storefront. Your store. Your customers. Up and running.

Got a set to break down? Part it out. Pick the set, and every part becomes a priced listing in one click. Organize the physical side with bins and printed labels, then follow an optimized pick path on every order. Set your pricing to run itself. Beat, match, or price to the market, and your listings stay competitive. When you make a sale, you get a picking list and an invoice, and you mark it shipped with tracking. And your analytics show your margins, what's sitting too long, and what to restock next. One store, run from one place. That's selling on CollectORbuild.