The LEGO Sanctum Sanctorum (76218) is worth it, and the cheap window has already shut. Brickset lists it at $249.99 for 2,708 pieces, retired on 31 December 2024, and as of August 2026 Brick Ranker has sealed copies at $308.58, up 23.4 percent. That is one of the stronger post-retirement moves among sets of its era, and it happened fast.
What $249.99 bought
Brickset lists 76218 with 2,708 pieces at $249.99 in the US and £214.99 in the UK, released on 1 August 2022, designed by Justin Ramsden. It is an 18+ set and the rate comes to 9.2 cents per piece. It holds 4.4 out of 5 from 442 Brickset ratings.
The model is 32 by 31 by 26 cm, so it has a small footprint for its price band. That is deliberate. It is built to modular-building proportions rather than as a standalone display object, and it sits in a row rather than commanding a shelf.
There are nine minifigures, seven of them unique to the set, and the build splits across three instruction booklets, one per floor.
A Marvel modular
Jay's Brick Blog scored it 4 out of 5 and was clearest about what makes the set work. The exterior "perfectly captures the Sanctum Sanctorum," and the printed circular dome window is singled out as the highlight, looking right from inside and outside.
The structural decision the review calls inspired is the modular compatibility. Making the Sanctum a modular-scale corner building rather than a bespoke playset means it slots into an existing street, which is not something most licensed Marvel sets can do. Inside, all three floors carry Marvel references, and the review notes plenty of playability rather than a sealed diorama.
The main build complaint is the sticker sheet, described as huge and flagged as something that might not be for everyone. The review does not give a count, so treat sticker application as a real part of the job without assuming a specific number.
The minifigures are the weak point
This is the criticism that recurs across coverage of the set. For a 2,708-piece flagship at $250, the roster is thin. Jay's Brick Blog rates it weak, naming America Chavez, Dr Christine Palmer and The Ancient One as missing, and calling the Scarlet Witch figure disappointingly plain with relatively featureless legs.
That matters for a buyer in a practical way. On a lot of Marvel sets the figures carry the aftermarket value, so a weak roster usually caps how far a set can run after retirement. This one has climbed anyway, which suggests the building itself is doing the work.
It moved faster than most
Brick Ranker's six-month average to August 2026 is $308.58, or 23.4 percent above retail, drawn from 872 recorded sales since August 2022, and it works that out as a yearly return of roughly 13.4 percent.
One figure on the same page is worth separating out rather than folding in. Brick Ranker's most recent single month, August 2026, shows $428.21 across 24 sales. That is a monthly datapoint, not the six-month average, and 24 sales is a small sample. The two numbers measure different things, so the honest reading is that the six-month figure is the reliable one and the recent month is a signal that prices may still be climbing. Catching that kind of divergence early is the practical argument for tracking a collection in something like Stud Vault instead of checking a listing once a year.
Two retired sets, two very different outcomes
The Lion Knights' Castle (10305) makes the contrast plain. It retired a year later, at the end of 2025, costs $399.99, and as of August 2026 Brick Ranker has it at $400.55, which is 0.1 percent above retail. Flat.
The Sanctum is the smaller, cheaper set with the weaker figure roster and it has returned 23.4 percent. Time off shelves explains part of the gap, but not all of it: a licensed Marvel building with modular compatibility has two audiences bidding for it, and an unlicensed castle has one. The LEGO Titanic 10294 review covers what happens when a set has display presence but no licence bidding it up.
Worth it, at the new price
Buy the Sanctum if you want it for a modular street, you accept the figures are a bonus rather than the reason, and $308 or so (the August 2026 average) does not put you off. It earns an 8: an excellent building let down by a roster that should have been better at this price.
Skip it if you are hunting a bargain, because that chance closed in 2024, and skip it if you are buying for the Multiverse of Madness characters specifically. The three most requested ones are not in the box.
