550 LEGO Basic Building Set

LEGO 550 Basic Building Set was a 569 piece Basic set with 2 minifigs released in 1985. The current value for a new and sealed Basic Building Set is estimated at $290 with an average yearly gain of about 5%. The current used prices for Basic Building Set can be found in the range of $49 and $59 depending on the set's condition, with an average price of $50 if it is in good overall condition.