The NADA (National Automobile Dealers Association) book for motorcycles is a guide used to determine the book value of a motorcycle. The NADA motorcycle guide is available online.
To use the NADA motorcycle guide online, the site requests a zip code before entering specifics about the bike. This is because motorcycles have different values in different parts of the country. After entering a zip code, the web page updates and asks for details about the motorcycle in question, such as make, model and year. Book values for the motorcycle, in different conditions, will then come up on a results page.
Kelley Blue Book (KBB) also has an online motorcycle price guide, and checking values on both NADA and KBB can help to establish the most accurate price for a specific location.