Before you contact a dealership for the car you want, check out a few used dealerships. Start by exploring their inventory for the car you want, then check their reviews. There is nothing more telling than wronged customers. Take it all with a grain of salt because not every car is going to be perfect, but if their bad reviews outweigh their good reviews, look elsewhere for your car.
Have you found a car that isn’t being sold by a dealership? The best course of action is to formally request a history of the car. The seller or dealership should be able to provide you with this, but make sure it’s not forged. They should have gotten their report from one of these sites:
Each of these should provide a full history of the car including previous owners, any accidents, and mechanical failures. Ask your seller for this before you offer to purchase the car. Once you have that report decide if you’d still like to purchase the car, then you can begin making arrangements with the seller.