I bought my car here last year and now as I'm tryi...

I bought my car here last year and now as I'm trying to sell my car, I noticed so many problems about the car that my dealer did not tell me about. Just because the car doesn't have recorded accidents, it doesn't mean he can tell me "this car has never been an accident" without a blink of an eye. I mean I guess it was part my fault to for not checking the inside of the car but man... ALSO he did not mention that the car was used as a rental by the previous owner.... this dropped my car price so much when I tried to sell it. I can't believe I paid 16,000 to buy that car at the first place. Don't remember the dealer's name but I won't be buying from here again.