LEGO 112 Building Set is a vintage Universal Building Set set from 1977 valued at $255 for new and sealed sets, up 1243% from an original retail price of $18.99. Annual appreciation has averaged 5.54% since release. Used copies are valued between $25 and $32 depending on condition. Listings for sale remain steady, but the set's value has climbed over the last three months, outpacing similar retired sets.
LEGO 112-1 Building Set is a Universal Building Set theme, Basic Set subtheme release from 1977 containing 200 pieces. It was a U.S.-exclusive set, also labeled “Universal Building Set,” and corresponds to 30 Universal Building Set sold in Europe, the United Kingdom, Canada, and Australia. The assortment includes bricks, plates, slopes, windows, doors with shutters, arches, wheels, and a large pine tree. It also features Homemaker/maxifigure elements such as torsos with articulated arms, heads, and hairpieces for buildable figures, along with early-era bricks like 2x2 and 2x4 pieces without internal or cross supports.
Building Set has climbed about 5.5% a year since retirement and is worth around $255 sealed. If the forecast is right, it keeps going, to about $289 in five years. The average used price is $26 for those in good overall condition. New and sealed listings currently range from $225 to $345.