Is it worth it buying an early 2000s 4runner in 2020?
its all relative to the condition of the vehicle.
Toyota is one of the best cars/trucks you can buy. I'd recommend them over just about any other. As lincolnscott said, it's all relative. That is, you need to check the condition and provenance of the vehicle, If you don't know a lot about cars, have a mechanic review any car you're serious about buying, and don't believe what a seller tells you.