LEGO 3734 Blue Train Windows with Panes is a Bulk Bricks set from 2000 valued at $32 for new and sealed sets, up 435% from an original retail price of $5.99. Annual appreciation has averaged 6.67% since release. Used copies are valued between $26 and $29 depending on condition.
LEGO 3734-1 Blue Train Windows with Panes is a Bulk Bricks Trains set released in 2000, containing 20 pieces. The pack includes 10 Blue Window 1 x 4 x 3 Train frames with hollow studs (part 4033) and 10 matching Trans-Clear panes (part 4034). Sold as a parts pack, it provided standard 1 x 4 x 3 window components for building or modifying LEGO train cars and related structures.
A new and sealed Blue Train Windows with Panes is currently valued at around $32, with annual growth of approximately 7%, which is higher than other Trains sets. The average used price is $27 for those in good overall condition. Based on current trends, this set could be valued near $34 within the next year. New and sealed listings currently range from $28 to $37.