Purchased a used car 3 years ago The dealer never disclosed it was involved in an accident What is your recourse?

Purchased a used car 3 years ago The dealer never disclosed it was involved in an accident What is your recourse?
Purchased a used 2003 Lexus LS430 from a Lexus dealership in state of Washington. The dealership never disclosed that the car was involved in a accident 8 months prior. Now I cannot sell it. What are my options?