How much is LEGO Heavy-Duty Excavator worth?
Set 42121-1 · 569 pieces
$70.00
new / sealed
$43.50
used
+75%
vs $39.99 RRP
$0.12
per piece
LEGO Heavy-Duty Excavator (42121-1) is worth about $70.00 new (or $43.50 used) at current secondary-market prices, up 75% from its $39.99 retail price.
Value history
Value historytracking since Jul 27, 2026
Currently $70.00 new. We just started tracking this set’s value. The chart fills in as prices are re-checked over the coming weeks.
Track this set’s value
Add it to your collection and we’ll keep its value up to date, free.
Track it free → See offers & detailsBlended secondary-market estimates. Not an appraisal or an offer to buy. Compare with another set → · Value your whole collection → · Most valuable sets →