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King Boo and the Haunted Yard Expansion Set

Snapshot

vs RRP
28% under
Per piece
5.7¢

Value per piece

cost per part at each reference

5.7¢lowest market value

about 51% under retail, which runs ~12¢ a piece

Reference

MSRP12¢
Used market5.7¢
New market8.4¢
Set Retired

King Boo and the Haunted Yard Expansion Set

Reference
71377-1
Theme
Super Mario
Year
2020
Parts
431

King Boo and the Haunted Yard Expansion Set is a LEGO set from the LEGO Super Mario theme released in 2020. The set contains 431 parts.

New avg$36.00Used avg$24.50MSRP$49.99

Avg. 3rd-party market prices via BrickPicker, not CollectORbuild seller prices

See full valuation & price history →Track its value free →
Value historytracking since Jul 28, 2026

Currently $36.00 new. We just started tracking this set’s value. The chart fills in as prices are re-checked over the coming weeks.

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Parts in this set (144)

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A peek at the pile. See the full list, grouped by color, on the parts page.

Insect, Spider with Elongated Tail Section2×Brick 1 x 27×Brick Sloped 30° 1 x 2 x 2/31×Brick Sloped 33° 3 x 25×Brick Sloped 33° 3 x 3 Double Convex8×Brick Sloped 45° 2 x 2 Double Convex2×Weapon Spear Tip with Fins2×Plant, Flower Stem with Bar and 6 Stems2×Plate 1 x 2Photo shows a different color. This lot is Black.3×Plate 1 x 42×Plate Special 1 x 2 with 1 Stud with Groove and Inside Stud Holder (Jumper)2×Plate Special 1 x 2 with Handles on Ends4×Plate Special 1 x 4 with 2 Studs with Groove [New Underside]1×Technic Plate 2 x 4 [3 Holes]1×View all 144 →