LEGO 6081 King's Mountain Fortress is a vintage Castle set from 1990 valued at $2,764 for new and sealed sets, up 4665% from an original retail price of $58.00. Annual appreciation has averaged 8.16% since release. Used copies are valued between $231 and $302 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 $2,764, with annual growth of approximately 8%. The average used price is $252 for those in good overall condition. Based on current trends, this set could be valued near $2,971 within the next year. The 8 included minifigs account for approximately 24% of the set's total value.