You can run the vehicles VIN and get it’s service and accident history. Actually I would have the dealer do it so as not to waste your time. If the car is a good buy the dealer will be happy to show you the report.
Having a qualified mechanic check it out is also a good idea.
One thing to look out for is where the car came from and/or was driven. If it came from a state or area that’s had a lot flooding I would be wary of the car.
Check the underside for gouges, scrapes, dents in the fluid pans or gas tank. All can indicate rough service or a lot of gravel road time. Scrapes and dings underneath can open the way for rust.
Check tires for uneven wear, cupping, which may indicate wheel alignment or bearing problems.
While you are looking under the hood, salvage yard parts commonly have the make, model, and year of the vehicle written on them in yellow or white paint marker. This might indicate a collision or other damage the owner might not be forthcoming about.
Check your local Credit Union and/or banks. Repo’s offer some good deals. Some people turn them in b/c thay can no longer make the payments. Have them checked by mechanic.
We bid/paid $2010 for 2003 Mercury Marquis LS Ultimate, leather interior, V8. By the way, the Kelley Blue Book value of that 2003 Mercury Marquis was: $6,875 - $8,000. The CR told us they took a loss on the car.
Purchasing a used car is a practical decision. Certainly, pay attention to the suggestions offered here. However, whenever a part of the nation has experienced severe flooding be especially wary whether it be a new or used car.
Purchasing anything requires the same protection freedom requires, eternal vigilance. Americans haven't done such a good job of protecting their freedoms. I hope you have better luck with your car purchase.