Several resources can help you determine the value of a classic car. Consulting price guides such as the Kelly Blue Book's Classic Car Guide or the Hagerty Price Guide can give you a general idea of a car's value based on its make, model, condition, and other factors. However, it's essential to remember that these guides provide estimates and the actual market value can vary. Additionally, you can consult with appraisers, join classic car forums or clubs to seek advice from experienced collectors, and monitor recent sales of similar vehicles to understand the market value.