As of 2015, Hagerty offers a valuation tool that allows users to estimate the value of their cars depending on make, model, year and condition. In addition, NADAguides publishes the NADA Classic, Collectible, Exotic and Muscle Car Appraisal Guide & Directory book, and updates it three times per year.
The Hagerty valuation tool tracks car values over time, and lets you see historical values. It is also available online and free to use. The NADA guide sells for $43 for a single edition, and $86 for a 1-year subscription (3 issues) as of 2015. The NADA guide is updated in January, May, and September.