How to get eBay alerts for retired LEGO sets

Search by set number, not set name

Every LEGO set has a number, printed on the box and the instructions and usually in the listing title. Names repeat: “Millennium Falcon” has been the name of many sets over the years, from small polybags to the Ultimate Collector Series models 10179 (2007) and 75192 (2017). The number is the only thing that means one set.

• Keywords: LEGO plus the number, like LEGO 75192. Adding the name is optional; leave it out if sellers might phrase it differently, such as “UCS Falcon”.
• Re-releases get new numbers. The Ideas Saturn V was sold as 21309 and later again as 92176. A Spotter for one number won’t catch the other, so run one for each.
• Know what’s in the box. Before you buy a used set, look up its inventory and minifigures on LEGO’s site or BrickLink’s catalog so you can check the photos against them.

Sealed, complete or incomplete

The same set number covers very different listings. These are the words sellers use and what to check for each.

“Complete” is the seller’s word, not a guarantee. Ask whether they checked it piece by piece against the inventory, whether the minifigures are the originals from the set, and whether the stickers were applied or the sheet is unused.

Box and instructions

For a sealed set, the box is much of the value. Sellers describe it with terms like shelf wear, crushed corner, creases, dents, punctures and sun faded. Ask for photos of all six sides and the seals, and look for tape or glue on the flaps, which can mean a box was opened and resealed.

Instructions for most sets can be downloaded from LEGO’s website, so missing booklets matter less if you just want to build. Collectors pay more for a set with its original instructions and box, so “no instructions” and “no box” are worth excluding when completeness counts. Ask a seller shipping a sealed set to pack it in a second, larger box rather than a mailer bag.

Minifigure-only lots and parted-out sets

Valuable sets get split up and sold in pieces, and every one of those listings carries the set number. A plain search for LEGO 75192 also brings up the minifigures alone, the instructions alone, the empty box, and the set without its minifigures.

The fix is to exclude phrases, not single words. Excluding “box” would also drop every listing that says “with box”. Instead, add these to Exclude:

• minifigures only, minifigs only, minifig only
• no minifigures, no minifigs, no figs
• instructions only, manual only, box only, empty box
• sticker sheet, if replacement sticker sheets keep turning up

If the minifigure is what you collect, flip it around: search for the character name and minifigure, and add the set number to “Must include” when only the version from one set will do.

Signs it isn’t LEGO

Building sets from other makers are sold in large numbers, some copying LEGO sets piece for piece. They aren’t what a LEGO collector is paying for. Watch for:

• Words in the title: compatible, fits LEGO, building blocks, MOC (a fan-designed model, not an official set) and custom (custom-printed minifigures and parts).
• No LEGO name on the studs. Most genuine bricks have “LEGO” molded on each stud. Ask for a close-up if you can’t see it.
• A box that doesn’t match. No LEGO logo, a different brand name, or a set number that doesn’t match the official one for that model.
• A price far below sold listings for a sealed retired set, especially from a seller with several of the same set.

Adding compatible, building blocks, MOC, custom to Exclude removes most of these before they reach you.

Bulk lots

Bulk lots are sold by weight or by the bin, usually unsorted. They can hide minifigures, specialty pieces and partial sets, and they can also be padded with other brands. Before you buy, look through every photo for minifigures and recognizable sets, and ask whether the lot contains non-LEGO pieces or Duplo, whether it has been cleaned, and whether it came from a smoke-free home. Heavy lots are expensive to ship, so a Spotter set to local pickup within 25 or 50 miles of your ZIP code lets you skip the shipping and see the bricks before you pay.

Set up a LEGO Spotter

1. Name the set. LEGO plus the set number. One Spotter per number.
2. Choose the condition. New for sealed sets, used for built or opened ones. For sealed only, put sealed in “Must include” too.
3. Set the price. Check eBay’s sold listings for the set in the same condition, since sealed, complete and incomplete copies sell very differently. A minimum price also helps skip instruction booklets and single minifigures.
4. Fill in Exclude. Use the parted-out phrases and the non-LEGO words above.
5. Start it. New matches arrive by email and on your Alerts page. Check the seals, the inventory and the seller before you buy.

Start from the box, a sentence or a link

A set number is the surest search, and Spotter Otter has three other ways to get to one.

• Shop by photo. On a phone, “Take a photo” opens the camera, or you can upload a picture or a screenshot, such as one from someone’s wishlist. Photograph the box or the instruction booklet cover, where the set number and name are printed. Spotter Otter reads the LEGO name and set number, uses eBay’s image search for clues, and writes a description of the set for you to check before starting, with the closest current listings for reference. The photo isn’t stored; it’s sent to OpenAI and eBay to identify the item.
• Describe it in your own words. Write something like “sealed LEGO 10179 Millennium Falcon with minifigures, box in good shape”. Luna, Spotter Otter’s AI, turns it into a search and a list of must-haves, which you confirm. A maximum price is required.
• Must-haves checked like a person would. A must-have like sealed is matched with the words sellers use for it: MISB, NISB, factory sealed. A listing that says the box was opened or the set was built is left out; one that doesn’t say gets a Maybe, so you can check the seals in the photos yourself.
• Paste a link. Paste a store’s product page for a set before it retires, or an eBay listing you missed, to start a Spotter for the same set.