LEGO 6150 Crystal Detector is a Aquazone set from 1998 valued at $119 for new and sealed sets, up 494% from an original retail price of $19.99. Annual appreciation has averaged 4.78% since release. On the used market, values range from $29 to $36 based on condition.
LEGO 6150-1 Crystal Detector is an Aquazone Hydronauts set released in 1998, containing 104 pieces and 1 minifigure. The set builds an underwater ground vehicle with propellers, a single-seat cockpit, and two articulated front arms fitted with a claw and a hook. It includes Navigator Hip "Muddy" Waters, whose detachable armor light can also be mounted on the vehicle. Other accessories and equipment include a suction cup gun, two chrome silver harpoons, and lights/sonar emitters.
A new and sealed Crystal Detector is currently valued at around $119, with annual growth of 3.2% that is expected to level off to around 3.1% in the coming year. The average used price is $30 for those in good overall condition. Based on current trends, this set could be valued near $121 within the next year. The 1 included minifig account for approximately 18% of the set's total value.