Visiting any car dealerships or car lots, whether used or new can be an intimidating experience. Inherent in a new car lot is the implied factor that the car will be new and should give you no problems until the warranty has expired. Whereas used car lots seem to imply that the cars for sale have been discarded by their owners so they can purchase another newer or better car.
This isn't entirely true though because the used car lots also extend warranties for the vehicles they sell. Most used car lots will examine a used vehicle before they accept it for sale. They usually have an extensive check list which they use to verify that the car is drivable and can be sold as a used car.