LEGO 4 Basic Set is a vintage Universal Building Set set from 1973 valued at $699 for new and sealed sets, up 7679% from an original retail price of $8.99. Annual appreciation has averaged 8.57% since release. On the used market, values range from $49 to $61 based on condition.
LEGO 4-3 Basic Set is a Universal Building Set / Basic Set released in 1973, containing 230 pieces. It was sold exclusively in Europe, the UK, Australia, and Canada, and is the same set as 125 Building Set released in 1974. The assortment includes standard bricks in black, blue, red, white, and yellow, with sizes ranging from 1x1 to 2x10, along with doors, shutters, fixed and panorama windows, and wheel elements with smooth tires. A large green baseplate is also included, allowing the set to support both simple buildings and vehicle models.
A new and sealed Basic Set is currently valued at around $699, with annual growth of approximately 9%, which is higher than other Basic Set sets. The average used price is $51 for those in good overall condition. Based on current trends, this set could be valued near $754 within the next year.