LEGO 6347 Monorail Accessory Track is a vintage Town set from 1991 valued at $493 for new and sealed sets, up 1310% from an original retail price of $34.99. Annual appreciation has averaged 6.52% since release. On the used market, values range from $235 to $331 based on condition.
LEGO 6347-1 Monorail Accessory Track, also known as Airport Shuttle Accessory Track, is a Town Monorail set released in 1991 with 54 pieces. It was designed as an expansion for 6399 Airport Shuttle and includes 12 monorail track pieces in straight and curved sections, two switch tracks, 10 support struts, and thirty 1x4 connector plates. The set introduced the first LEGO monorail switch tracks, elements that later appeared again only in 6991 Monorail Transport Base from 1994. Its instruction booklet includes four suggested track layouts for use with either 6399 Airport Shuttle or 6990 Monorail Transport System.
A new and sealed Monorail Accessory Track is currently valued at around $493, with annual growth of approximately 4%, which is lower than other Monorail sets. The average used price is $272 for those in good overall condition. New and sealed listings currently range from $417 to $583. Based on current trends, this set could be valued near $523 within the next year.