LEGO 6081 King's Mountain Fortress is a vintage Castle set from 1990 valued at $2,960 for new and sealed sets, up 5003% from an original retail price of $58.00. Annual appreciation has averaged 8.54% since release. Used copies are valued between $244 and $300 depending on condition.
LEGO 6081 King’s Mountain Fortress is a Castle Crusaders set released in 1990, containing 435 pieces and 8 minifigures. It builds a substantial fortress with a gatehouse, tower, and small jail cell, featuring a working drawbridge and a gate that can be raised and lowered. The minifigure lineup includes King Richard, two Lion Knights, two archers, a ghost, and two Black Monarch’s Knights, with two of the knights mounted on horses. In the United Kingdom, the set was marketed as The Haunted Castle.
A new and sealed King's Mountain Fortress is currently valued at around $2,960, with annual growth of approximately 6%, which is lower than other Crusaders sets. The average used price is $250 for those in good overall condition. Based on current trends, this set could be valued near $3,192 within the next year. New and sealed listings currently range from $2,602 to $3,483.