Unless there was a dead body in the trunk or back seat, I'm not worried about it. My current daily driver had a nasty odor in the interior when I bought it, but at the price I paid, it was the least of my concerns. I pulled everything except the headliner and cleaned it all with a carpet and upholstery cleaner. Took one Saturday afternoon to get it done, and over 2 years later the smell hasn't come back.