31213 Mona Lisa — Jun 19 key metrics
BrickRanker 6-month rolling averages, data as of May 26. All figures USD.
Mona Lisa leads Jun 19 radar — −38.9% discount, tightest forecast among Art sets
LEGO Art 31213 Mona Lisa ($61.14, −38.9% vs. $99.99 MSRP) takes the Jun 19 lead — deepest discount in a five-set cohort where three sets carry fresh May 26 BrickRanker data. NASA Mars Perseverance Rover (42158, −32.1%) enters as secondary pick with the tightest forecast band in the pool at just 5.44pp (+40.21% mid) and the highest liquidity at 72 sales. Classic TV Series Batmobile (76328) is noted but excluded on its narrow −8.4% discount. On the sideboard: Huracán Tecnica (42161) is 84 days stale with a delisting threshold of Jun 26 (six days), and Fountain Garden (10359) sits at 54 days stale with a 32pp forecast band. 13th consecutive ultra-stable session; 43rd consecutive zero-listing platform run.
Five cooldowns lift today, giving this radar its largest single-day cohort in over a week. 31213 Mona Lisa (Art, $61.14, −38.9% vs. $99.99 MSRP) takes the lead on the deepest discount in a pool where fresh data is available. 42158 NASA Mars Perseverance Rover enters as the high-confidence secondary pick — its 5.44 percentage-point forecast band is the tightest of all five returning sets. On the sideboard: 42161 Lamborghini Huracán Tecnica is now six days from BrickRanker's 90-day delisting threshold, and its data has not moved since March. 1
Quick-scan table
All prices USD. BR avg = BrickRanker 6-month rolling average sold price. Forecast = 2-year post-retirement appreciation midpoint. Data age counted from Jun 19.
| Rank | Set | Theme | MSRP | BR avg | vs. MSRP | Forecast mid | Band | Sales | Data age |
|---|---|---|---|---|---|---|---|---|---|
| #1 Lead | 31213 Mona Lisa | Art | $99.99 | $61.14 | −38.9% | +28.71% | 13.56pp | 44 | May 26 — 24d ✅ |
| Secondary | 42158 NASA Mars Rover | Technic | $99.99 | $67.90 | −32.1% | +40.21% | 5.44pp ✅ | 72 | May 26 — 24d ✅ |
| Watch | 10359 Fountain Garden | Icons | $99.99 | $67.50 | −32.5% | +29.04% | 32.06pp ⚠️ | 26 | Apr 26 — 54d ⚠️ |
| Weak | 76328 Classic Batmobile | DC | $149.99 | $137.39 | −8.4% | +18.53% | 20.73pp | 47 | May 26 — 24d ✅ |
| 🚨 Delist | 42161 Huracán Tecnica | Technic | $49.99 | $37.58 | −24.8% | +38.89% | 22.82pp | 23 | Mar 26 — 84d stale |
#1 — 31213 Mona Lisa
Set 31213-1 | LEGO Art | 1,503 pieces | 0 minifigures | MSRP $99.99 | Estimated retirement Jul 31, 2026
統計カードを読み込んでいます…
BrickRanker's 6-month rolling average sits at $61.14 — a −38.9% discount to the $99.99 MSRP. That gap widened 0.9 percentage points from the previous checkpoint ($61.98 → $61.14), continuing the pattern of slow, steady compression toward MSRP parity on the secondary market. The data is 24 days old, which is within BrickRanker's normal monthly refresh cycle and does not introduce meaningful reliability concerns for this set. 1
The forecast band runs from +21.93% at the low to +35.49% at the high — a 13.56pp spread. That makes it the second-tightest band in today's cohort, behind only the Mars Rover. BrickRanker's confidence rating is High. Among the three sets with both a meaningful discount (>30%) and a model-backed appreciation forecast, Mona Lisa wins on discount depth. 1
Why the Art theme holds up
Art sets have a documented post-retirement resale pattern: they build slowly, are disproportionately purchased as display pieces rather than play, and tend to surface in sealed condition on the secondary market more often than play-line sets. Mona Lisa's 44 total BR-recorded sales since October 2024 reflect both real liquidity and the constrained secondary supply typical of Art theme sets — not every owner resells. The set was ranked 444th largest LEGO set overall and 20th largest in the Art theme by BrickRanker. 1
At $61.14 with 1,503 pieces, the price-per-brick comes out to $0.07 — low for a retired display set. The gold frame and recognizable subject matter make this one of the more accessible Art sets for collectors who aren't dedicated LEGO Art enthusiasts.
Estimated retirement: Jul 31, 2026 — 42 days from today. As with all Jul 31 sets, no secondary-market price pressure has materialized yet. If the historical pattern holds, any scarcity premium would emerge in the weeks immediately following retirement, not before.
Authentication notes
Art sets are built on large mosaic plates and solid-color plates that are hard to convincingly fake at scale. The key risk in used/open listings is completeness: mosaic builds use hundreds of tiny 1×1 plates in specific colors, and missing pieces in corner sections or the gold frame border are common. On any open-box listing, request a photo of all bags in original condition or a completed build photo from multiple angles. Box-only sealed listings without weight or tape seal evidence are higher risk.
Secondary — 42158 NASA Mars Perseverance Rover
Set 42158-1 | LEGO Technic | 1,132 pieces | 0 minifigures | MSRP $99.99 | Estimated retirement Jul 31, 2026
BrickRanker puts this at $67.90 against the $99.99 MSRP: a −32.1% discount, 6.8 points shallower than the Mona Lisa. The discount alone does not make it the lead. What does make it worth a close look is the forecast. 2
The 2-year post-retirement forecast is +40.21% mid, with a band from +37.54% to +42.98% — a spread of just 5.44 percentage points. That is the tightest band among all five returning sets today, roughly 2.5× tighter than the Mona Lisa's 13.56pp and nearly 6× tighter than the Fountain Garden's 32.06pp. Tight band = the model has more sales history to anchor the estimate. With 72 total recorded sales since June 2023 — the highest sales count in today's cohort — the Mars Rover is also the most liquid set on the board. 2
The read on this set: if you prioritize forecast confidence over maximum discount depth, the Mars Rover is the stronger hold argument. The Mona Lisa gives you a bigger buy-in discount; the Rover gives you a more predictable appreciation path.
Note on previous checkpoint discrepancy: the prior run recorded an anomalous value in the $29 range for this set. The current BrickRanker page shows $67.90 on a $99.99 MSRP set, and there is no BrickRanker metric that produces a $29 figure for this set. Use $67.90 as the authoritative current reference.
Honorable mention — 76328 Classic TV Series Batmobile
Set 76328-1 | LEGO DC | 1,822 pieces | 1 exclusive minifigure | MSRP $149.99
BrickRanker has this at $137.39 — only −8.4% below MSRP, the narrowest discount in the cohort by a wide margin. For context, the next-narrowest is the Fountain Garden at −32.5%. The 1,822 pieces at $0.08 per piece and one exclusive Batman Classic TV Series minifigure (BrickRanker value $29.84, 22% of the set's market price) are appealing on paper. But a −8.4% discount on a set that is still 42 days from retirement does not constitute a deal under this radar's criteria. 4
The forecast is +18.53% mid with a wide 20.73pp band (+6.67% to +27.40%). The exclusive Batman figure creates some value floor, but the combination of near-MSRP pricing and high forecast uncertainty means this set belongs on a watchlist, not a buy list today.
Sideboard: stale data
🚨 42161 Lamborghini Huracán Tecnica — delisting alert
This set's cooldown lifted today, but the data situation has gotten worse since it was last eligible on Jun 12. BrickRanker's price data for 42161 is now 84 days stale — last updated March 26, 2026. The 90-day BR delisting threshold falls June 26: six days from today. At 90 days without a recorded sale, BrickRanker drops a set from active tracking. 5
The numbers on file — $37.58 (−24.8% vs. $49.99 MSRP), +38.89% forecast mid — are three months old and based on only 23 total lifetime sales on BrickRanker-tracked platforms. Zero sales have been recorded in most months since April 2025. The March figure is not a current price reference; it reflects conditions from before spring 2026's secondary-market pricing cycle. Do not use $37.58 as an actionable quote. 5
If a single new marketplace sale is recorded before June 26, BrickRanker may refresh and restore this set to active tracking. If not, this will be the last appearance of the Huracán Tecnica on the radar. Jun 20 check will confirm whether it survives.
10359 Fountain Garden — wide band, stale
BrickRanker's average for the Fountain Garden is $67.50 (−32.5% vs. $99.99 MSRP), but the data is 54 days stale as of today — last updated April 26. The 2-year forecast spans +9.61% to +41.67%: a 32.06pp band that is by far the widest in today's cohort. 3
The 26 total lifetime sales provide a thin foundation for both the price estimate and the model. The low end of the forecast (9.61%) barely clears typical inflation; the high end (41.67%) is competitive. That spread is the problem — at 32pp, the model is effectively telling you it does not know where this set lands post-retirement. Treat the $67.50 figure as directionally useful but not as a live quote.
Session notes
13th consecutive ultra-stable session. All five sets with trackable data recorded sub-$1.00 price moves from the previous checkpoint: Mona Lisa −$0.84, Fountain Garden −$0.55, Huracán −$0.31. The Rover's current baseline was reset to $67.90 after a prior-checkpoint anomaly; the Batmobile entered fresh tracking. No set has shown pre-retirement scarcity pressure. With the July 31 wave 42 days out, secondary prices remain flat. 6
Retirement tracker: 110 sets, 40 themes (+1). The set count held at 110 for another session. Theme count ticked up by one from 39 to 40 — a new theme joined the retiring-soon list between the previous pull and today. The July 31 cohort remains the dominant wave; Star Wars leads with 13 retiring sets, followed by Icons (9) and Technic (9). 6
Platform scanner: 43rd consecutive zero. eBay, BrickLink, Mercari, Vinted, and Depop returned zero confirmed new listings for retired sealed LEGO sets across all 43 consecutive daily pulls. BrickRanker 6-month rolling averages are the only actionable price reference for this channel.
Pipeline preview: Jun 20
Five sets come off cooldown tomorrow: 31208 Hokusai Great Wave (Art, last seen at −21.6% MSRP, +30.12% forecast mid), 75404 Acclamator-class Assault Ship (Star Wars, −26.7%), 10338 Bumblebee (Icons, +23.57% forecast), 75401 Ahsoka's Starfighter (Star Wars), and 75405 Home One Mon Calamari Star Cruiser (Icons, −31.9% at last read). Jun 20 should be the largest single-day cohort of the current cycle.
チャートを読み込んでいます…
Jun 19 discount comparison across all five returning sets. Huracán marked with asterisk — 84-day stale data, figure is not a current price reference. Fountain Garden is 54 days stale. Sources: 1 2 3 4 5
Price data: BrickRanker 6-month rolling averages fetched Jun 19, 2026 (window ending ~15:05 ET). All figures USD. BrickRanker is the sole price source for this edition. Figures are secondary-market sold-price averages, not live asking prices. Retirement dates are BrickRanker estimates subject to change. 42158 Mars Rover data is May 26 (24d) — treat as orientation. 10359 Fountain Garden data is Apr 26 (54d stale) — do not use as a live quote. 42161 Huracán Tecnica data is Mar 26 (84d stale) — 90-day delisting threshold Jun 26. Verify all listings independently before purchasing.
Cover image: LEGO Mona Lisa (31213-1) — BrickRanker
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