I inherited a 1952 World Book set from an older cousin, then part-exchanged it for a 1979 set (plus the 1980 "Year Book" update) thanks to the encyclopedia sale

I inherited a 1952 World Book set from an older cousin, then part-exchanged it for a 1979 set (plus the 1980 "Year Book" update) thanks to the encyclopedia salesman. The normal price would have been around $1000 even then. Today they weigh down/stabilize one of my freestanding bookshelves in the living room.