It matters supremely which engine this Camry has
The 2AZ-FE 4 cylinder engine has had several issues. It’s not a guarantee you will experience all of these problems, but Toyota has issued several TSBs, and they know about the potential problems. Statistically, you’ll probably be fine, but there are a few fairly expensive potential problems.
The 1MZ-FE and 3MZ-FE V6 engines are a much older, but more reliable, design. Those engines, in your Camry, are far less problematic.
Tell the owner to pop the hood and look on the emissions sticker. It will have the engine type and size listed.
Better yet, take a picture of the engine. We’ll be able to identify it.
I have a 2005 Camry, and I did all of my homework before buying it. I actually paid money to log onto the Toyota technical website, so that I could have access to all of the bulletins, recalls, etc. related to the cars I was considering. And with that information in hand, I went out to look for a Toyota within a certain model year range, with a specific engine and transmission.