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Reznor Knockdown Expansion Set

Snapshot

vs RRP
57% under
Per piece
2.3¢

Value per piece

cost per part at each reference

2.3¢lowest market value

about 72% under retail, which runs ~8.1¢ a piece

Reference

MSRP8.1¢
Used market2.3¢
New market3.5¢

Where to buy new

  • Walmartout of stock$58.98
  • Amazonout of stock$69.95
  • Barnes & Nobleout of stock$69.99

New at retail · MSRP $69.99 · via BrickPicker

Set Retired

Reznor Knockdown Expansion Set

Reference
71390-1
Theme
Super Mario
Year
2021
Parts
862

Reznor Knockdown Expansion Set is a LEGO set from the LEGO Super Mario theme released in 2021. It is built from 862 pieces.

New avg$29.95Used avg$19.47MSRP$69.99

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 $29.95 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 (285)

View all parts →

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

Brick 1 x 41×Brick Round 1 x 1 Open Stud3×Brick Round 2 x 2 with Axle Hole14×Brick Sloped 30° 1 x 2 x 2/32×Brick Sloped 33° 3 x 41×Brick Sloped 45° 2 x 2 Double1×Brick Sloped Inverted 45° 2 x 2 [Ovoid Bottom Pin, Bar-sized Stud Holes]1×Bracket 5 x 2 x 2 1/3 with Holes, Inside Stud Holder2×Hinge Brick 2 x 2 Top Plate Thin1×Plate 1 x 68×Plate 1 x 81×Plate 2 x 22×Plate 2 x 2 Corner5×Plate 2 x 45×View all 285 →