LEGO 135 Building Set is a vintage Universal Building Set set from 1973 valued at $354 for new and sealed sets, up 4382% from an original retail price of $7.89. Annual appreciation has averaged 8.85% since release. On the used market, values range from $94 to $117 based on condition.
LEGO 135-1 Building Set is a Universal Building Set Basic Set released in 1973, containing 338 pieces. It provides parts to build a duck, a small locomotive, and three houses, using an assortment of classic bricks in black, blue, red, white, yellow, and trans-clear. Notable elements include multiple door types with glass, window shutters, red and white panorama windows, red wheels with metal axles, various 33-degree slopes, and a large 10x20 green brick. Released in the United States, this set is identical to 6 Basic Set from the same year.
A new and sealed Building Set is currently valued at around $354, with annual growth of 5.9% that is expected to level off to around 1.7% in the coming year. The average used price is $97 for those in good overall condition. Based on current trends, this set could be valued near $357 within the next year.