The Kelly Blue Book
The KELLY BLUE BOOK value of your car is the market value listed in the Kelley Blue Book. Many people spell it wrong as Kelly Blue Book, or Kelly's Blue Book, or Kellys Blue Book or even NADA Blue Book. Others refer to it as blue book values or KBB. Kelly Blu Book started from a family owned used car business that bought trade-ins from auto dealers and used their internally generated list of used car prices to inform dealers how much the car was worth. They became trusted industry insiders and appraisers of car values. This led to Kelly Blue Book, named after the social register, called a blue book. The rest is history. Kelly bue book supplies used car prices to most car pricing sites.