Mona Lisa leads May 22 LEGO radar at −37% MSRP

No new secondary-market listings surfaced across eBay, Mercari, Vinted, or Depop during the May 21–22 window — the eleventh consecutive zero-listing run. The radar shifts again to value guidance: three sets where the data tells a clear story, and a full refresh of the July 2026 retirement wave pricing.

The Mona Lisa has the widest MSRP discount among all ten sets retiring July 31. BrickRanker's 6-month rolling average is $62.92 against a retail price of $99.991 — a gap of −37.1%. It is also still available at LEGO.com for $99.99 and on Amazon for $84.99, which makes the secondary market price look especially compressed.

The secondary volume is very low: 42 total recorded sales since October 2024, with only 5 in April 2026 and none recorded yet for May 20261. Thin trading is a double-edged signal. On one hand it means the BrickRanker average is based on a small sample — a few outlier sales can move the number meaningfully. On the other, thin secondary supply with a retirement 10 weeks out means competing listings won't undercut each other: the floor tends to hold rather than slide.

BrickRanker's 2-year post-retirement forecast is +28.71% from the current average (range: +21.93% to +35.49%)1. That projects the 2-year value at roughly $81–$85 — above today's secondary price but below MSRP. The Art theme tends to have a narrower collector base than Star Wars or licensed IPs, which typically keeps post-retirement appreciation modest. BrickEconomy's retirement projection is consistent with this window2.

Buy range: $60–$68 for complete/open based on the 6-month rolling data. No PriceCharting conflict has been detected for this set.

Authentication tips. The Mona Lisa is a mosaic panel set — no minifigures, minimal complex parts, and low counterfeit risk compared to licensed character sets. Primary checks: (1) Tile print quality — the set contains 1×1 tiles in a complex color gradient; authentic tiles have clean, sharp edges with no dye bleed between adjacent colors. (2) The gold frame pieces — official elements use a consistent metallic gold plastic; cheap knockoffs lean yellowish or show uneven sheen. (3) Box spine — the "Art" series packaging uses a specific font and pantone that fakes frequently mis-render with slight color shift. (4) Part count — 1,503 pieces; if a sealed copy feels significantly lighter than the BrickRanker price history suggests it should (typically around 3 lbs with packaging), verify part count before committing.

The Republic Gunship (the gunship design from Star Wars: Episode II — Attack of the Clones) retired in December 2023 and has been appreciating consistently since. BrickRanker's 6-month rolling average is $459.293, up +14.8% from its $399.99 MSRP at a yearly ROI of 5.9%.

The more useful signal is the May 2026 monthly average: $650.73 across 5 confirmed sales3. The 6-month rolling average ($459.29) and the recent-month realized prices ($650+) diverge significantly — that spread indicates the rolling figure is anchored by older, lower transactions from late 2023 and early 2024, while current buyers are paying considerably more. For decision purposes, the May 2026 realized prices are the more accurate signal for what you'd actually pay today.

BrickEconomy cites annual appreciation averaging 12.94% since retirement, slightly higher than BrickRanker's 5.9% yearly ROI figure — the two sources use different methodologies and sample windows4. Neither is wrong; they measure different things. The BrickEconomy figure is closer to the trajectory visible in recent months.

The set includes 2 minifigures: Mace Windu (Dark Tan Legs, Open Mouth — exclusive to this set) and a Clone Trooper Commander3. The exclusive Mace Windu variant accounts for roughly 4% of set value. Total recorded sales: 634 since December 2021 — healthy liquidity for a $400+ set.

Current market read: Sealed copies are trading in the $620–$680 range based on May 2026 data points. The BrickRanker 6-month average of $459 is misleading if used as a current buy target — it reflects a period that includes earlier, cheaper transactions.

The Bookshop is in the same retirement cohort as the Republic Gunship (both left shelves December 2023), but its May 2026 trading picture looks different: 1 recorded sale at $218.115 versus a 6-month rolling average of $217.50 that includes 18 sales in October 2025, 27 in November, 26 in December, and 27–30 per month through early 2026. May 2026 has essentially gone quiet.

A single-sale month can mean several things: sellers have pulled listings at the current price, buyers are waiting for a dip, or the market is temporarily thin. It does not signal a price crash — $218 is consistent with the prior rolling average. But it does mean don't use the BR average as a buy target this week without checking active listings: the single May data point is not statistically representative of where the market clears.

BrickEconomy estimates the Bookshop at $281.44 (new/sealed)6 — substantially above BrickRanker's $217.50. The divergence is meaningful: BrickEconomy's New value reflects sealed-box condition and may include a broader date range or different sample, while BrickRanker's average mixes open and sealed at various conditions. If you're buying sealed, $281 is probably a more accurate ceiling reference; if buying complete/open, $217–$225 reflects recent clearing prices.

The set contains 5 exclusive minifigures5 and was part of the Creator Expert Modular Buildings line — historically one of the more reliable appreciation tracks in LEGO secondary markets. The Bookshop's 8.8% total appreciation since December 2023 (+3.5% yearly ROI) is modest compared to Star Wars UCS, but Modulars tend to gain slowly and hold. This is a hold-and-watch rather than an urgent buy entry.

All 10 sets in the wave remain confirmed retiring July 31, 2026 with no status changes as of May 227189101112131415.

76328 Batmobile (⚠ conflict persists). BrickRanker shows $134.18 while PriceCharting Complete is listed at $107.00 via Google snippet — a ~22.5% spread by midpoint816. The conflict narrowed from the earlier ~46% figure (which compared BR against PC's "Pieces Only" tier rather than Complete), but the two sources still don't align. BrickRanker records 45 sales since October 2024; the full PriceCharting page has not been fetched to date. Treat the $107–$134 band as the uncertainty range rather than picking one number as ground truth.

42115 Lamborghini Sián (recharacterized — not a conflict). BrickRanker's 6-month average is $354.4117; PriceCharting New is $415.00 and Complete is $219.00 via snippet18. The previously reported discrepancy used a BrickEconomy estimate of ~$450 as the reference point — that was not a PriceCharting figure. BR at $354.41 is consistent with PC's Complete-to-New range and the set's post-retirement trajectory. No active conflict.