Collecting LEGO sets for value is mostly about three things you control: the price you pay, the condition you keep the box in, and the costs you pay when you sell. The part you do not control, how much a set rises, varies more than most guides admit. In our market data on October 7, 2026, the median set that retired from 2022 to 2025 is worth about 1.22 times its list price, 69% sit above list and 11% below. This guide covers the practical side. For which kinds of sets have gone up, see LEGO Sets That Appreciate: What the Data Shows.

Quick answer: buy below list, before the expected exit date. Keep the box sealed, flat, dry and out of direct sun, and keep the receipt. Price a sale from recent sold listings and subtract fees and shipping first. Expect to wait years, not months.
Educational content, not financial advice

LEGO sets are collectibles, not regulated investments. Values move and past results are no promise. A study of LEGO as an investment also warns that the market is far less liquid than the stock market and carries relatively high transaction and storage costs. Read the full disclaimer.

1. Before you buy: what to expect

  • The typical gain is modest. Our median of about 1.22 times list is before any selling costs.
  • Some sets lose value. 11% of the sets in our sample are worth less than list, and 20% are valued at exactly list.
  • Time matters most. Sets retired in 2022 have a median of about 1.46 times list; sets retired in 2025 are mostly still at list.
  • The long-run picture is better, and uneven. The study by Dobrynskaya and Kishilova found an average return of at least 11% a year from 1987 to 2015, with individual sets ranging from minus 50% to 600% a year.

The figures by theme, price band and years since retirement are in Are LEGO Sets a Good Investment in 2026?.

2. How to buy

Millennium Falcon

Pay less than list

The purchase price is the one number you set yourself, and it moves your break-even more than anything else. If fees and shipping take 15% of a sale, a set bought at list has to reach about 1.18 times list before you make anything; bought 20% below list, it breaks even at about 0.94 times. Retailer sales, gift-with-purchase offers and LEGO Insiders points all lower the effective price. For current discounts, see today's LEGO deals.

Use the expected exit date

An expected exit date is the most useful deadline you have. Of the 2,804 sets in our catalog with an expected exit date between 2020 and 2028, 97% leave on December 31 or July 31. Each set page shows its date when we have one. LEGO stops selling a set at that date; other stores sell their remaining stock for a while after. A date is a deadline, not a forecast: most sets that left shelves in 2025 are still valued at list.

Millennium Falcon

The Ultimate Collector Series Millennium Falcon, on sale since 2017, has an expected exit date of December 31, 2026, the kind of deadline worth knowing before you plan a purchase.

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Every set with a 2026 date is in our guide to the LEGO sets retiring in 2026.

Buy sealed, and check it

  • Buy from a retailer or a seller with a clear history, and look at photos of the actual box when buying second hand.
  • Check that the box seals are intact and the box is not crushed, torn or water stained. Box condition is part of what you are buying.
  • Imitation sets and resealed boxes exist on open marketplaces. If a price looks far below every other listing, assume there is a reason.

Know that LEGO remakes sets

LEGO has brought back popular subjects as new sets, and a remake can cool interest in the original. Two examples from our catalog:

LEGO Millennium Falcon
Millennium Falcon
Retired at LEGO; check the set page for where it is still sold

The 2007 Ultimate Collector Series Millennium Falcon, followed ten years later by a new UCS Falcon, 75192.

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LEGO Taj Mahal
Taj Mahal
Retired at LEGO; check the set page for where it is still sold

The 2017 Taj Mahal, a remake of the 2008 set 10189.

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3. How to store a set

  • Cool, dry and dark. Avoid attics, garages and damp basements, where heat and humidity swing. LEGO warns that bricks exposed to heat, such as hot sun, can change shape, and printed boxes fade in sunlight.
  • Flat, and not stacked too high. Weight crushes the boxes at the bottom of a pile, and box condition affects price.
  • Protect the box. Clear box protectors for display boxes are sold by third parties, for example LEGO box protectors on Amazon.
  • Keep the paperwork. Keep the receipt and a photo of the box when you bought it. You need both when you sell, and for tax records.

4. What condition does to value

Marketplaces sort sets by condition, and buyers of retired sets pay most for the first of these:

  1. New, sealed, box in good condition. What collectors look for.
  2. New, sealed, box worn or damaged. Still new, but priced lower.
  3. Opened box, sealed bags. Complete, but no longer sealed.
  4. Built and complete, with instructions. A used set.
  5. Incomplete or without box and instructions. Priced as parts more than as a set.

Our market figures on this site are for new, sealed copies. If you want to build a set and also keep one for value, you are buying two products: budget for both.

5. How to sell

Price from sold listings

Look at what the set has actually sold for recently in the condition you have, not at what sellers are asking. Use several sales, not one outlier, and note whether a high price included a perfect box.

Choose where to sell

  • BrickLink: the marketplace the LEGO Group bought in November 2019, used mostly by LEGO collectors.
  • eBay: the widest general audience.
  • Local listings: no shipping, which matters for large boxes, but a smaller pool of buyers.

Fees differ by marketplace and change over time, so check each one's current fee page before you price. Then subtract fees and shipping from the sale price to see what you actually keep.

Ship it safely

  • Ship the set box inside a larger box with padding on every side, so the set box arrives without dents.
  • Use tracked shipping, and insure valuable sets.
  • Photograph the box and the packing before it leaves.

6. Taxes and records

Profit from selling LEGO sets may be taxable, and the rules depend on where you live and how often you sell. Keep a simple record for every set: what you paid, the date, shipping, selling fees and the sale price. Ask a tax professional how your country treats gains on collectibles and personal property.

7. Mistakes to avoid

  • Paying more than list for a set still on sale. It moves your break-even before you start.
  • Assuming every set rises. One in ten sets in our sample is worth less than it cost new.
  • Forgetting fees and shipping. They can take the whole gain on a small set.
  • Selling straight after retirement. Most sets that left shelves in 2025 are still valued at list.
  • Putting everything in one set or one theme. A remake or a change in demand can stall a single set for years.
  • Storing boxes badly. Damaged boxes sell for less.

Sources

  • Victoria Dobrynskaya and Julia Kishilova, LEGO: The Toy of Smart Investors, Research in International Business and Finance 59 (2022), article 101539; HSE University working paper, 2018.
  • The LEGO Group, announcement of its acquisition of BrickLink, November 26, 2019.
  • Our market data and catalog, as of October 7, 2026: market values for new, sealed copies of 449 sets with an expected exit date in 2022 to 2025, and exit dates for 2,804 sets.

Related guides

This page is research based and is not financial advice. We may earn a commission on purchases made through our links.