The early Territory was subject to a few issues that demand care when buying one now. The main one was the front suspension lower ball joints, which wear out relatively quickly and typically require replacement every 100,000 km or even less. Check the front suspension. The diff bushes are also a problem area; they also chop out quite quickly, so check those when you’re under the car. The automatic transmission can also be a source of trouble, and it’s an expensive item to replace, so pay close attention to the operation, gear changing etc., of the auto.