Yes, sealed LEGO sets are worth more than used sets, typically commanding a significant premium over opened boxes. A factory-sealed retired set in mint condition will almost always fetch 30–70% more than the same set built or even unbuilt but opened, depending on rarity and demand.
The sealed box guarantees all pieces are present, instructions are pristine, and stickers are unused. Collectors value this certainty. Used sets require verification, may have missing elements, and often show wear on printed parts or instructions. That said, well-kept used sets from desirable themes still hold strong value, especially hard-to-find Technic or modular buildings where the set itself matters more than the box.
At BuyMyBricks, we stock both sealed and carefully verified used retired sets across all themes. Sealed sets command higher prices for good reason, but opened sets offer a more accessible entry point to discontinued LEGO without compromising the build experience.
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