LEGO 3734 Blue Train Windows with Panes is a Bulk Bricks set from 2000 valued at $36 for new and sealed sets, up 504% from an original retail price of $5.99. Annual appreciation has averaged 7.16% since release. Used copies are valued between $26 and $33 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 $36, with annual growth of approximately 7%, which is higher than other Trains sets. The average used price is $30 for those in good overall condition. Based on current trends, this set could be valued near $39 within the next year. New and sealed listings currently range from $30 to $39.