Should I avoid buying used cars from 14 years ago?

I guess a more specific question would be what’s the oldest car can i buy and still be practical/worth it? Im trying not to buy cars older than 20 years. I see a used car who seems like a good deal from 2009. I dont know if that’s still a bad idea. Im also on a budget, but would like to avoid a lot of repairs when i buy a used car.
Should I avoid buying used cars from 14 years ago?
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