Airport Shuttle

About

LEGO 6399 Airport Shuttle was a 767 piece set released in 1990. It was only one of three Lego models to feature an electric monorail, which ended up being highly unprofitable for Lego, and the monorail supplier eventually went bankrupt in the mid 90s. This made the monorail track/electric parts highly sought after, therefore steeply increasing the value of the set.

Today's value of a new and sealed set is estimated around £4,000.