I'm not a mechanic. I'm someone who buys used cars off Facebook Marketplace, and I learned this the expensive way. In 2021 I paid $4,000 for a 1999 Lexus LS400 showing only 50,000 miles. That number should have stopped me. I now think the odometer had been rolled back.
I didn't research the seller. I didn't get a pre-purchase inspection. Over the next 30,000 miles I put in suspension bushings, spark plugs, and about $1,500 on a cooling system whose hoses were cracked and leaking from every joint. Then it threw a rod. I sold it with a blown engine for $500.
So on the next one I did it properly: research the platform first, check the year-specific failure points, read what the listing wasn't saying, and inspect before paying. That was a 2011 Prius from an elderly couple, warranty and all. I drove it almost four years.
The truck that replaced it, a 2010 Tundra, went through the same process and has been exactly what it was supposed to be. BuyerAware is that process, written down and done for you, for about the cost of a tank of gas. If the car you're looking at is a trap, I'll tell you plainly and point you at one that isn't.
The 6 rules I buy by now โ