LEGO 3733 Grey Train Windows with Panes is a Bulk Bricks set from 2000 valued at $26 for new and sealed sets, up 336% from an original retail price of $5.99. Annual appreciation has averaged 3.81% since release. On the used market, values range from $21 to $24 based on condition. Secondary market prices for new and sealed sets typically fall between $23 and $29.
LEGO 3733-1 Grey Train Windows with Panes is a Bulk Bricks Trains set released in 2000, containing 20 pieces. It includes 10 light gray 1 x 4 x 3 train window frames with hollow studs (part 4033) and 10 trans-clear panes sized for the same window (part 4034). Intended as a parts pack, it provides matching frames and glazing for train cars and related builds.
A new and sealed Grey Train Windows with Panes is currently valued at around $26, with annual growth of approximately 3%, which is lower than other Trains sets. The average used price is $22 for those in good overall condition. New and sealed listings currently range from $23 to $29. Based on current trends, this set could be valued near $27 within the next year.