The rubber bushings on the TJ’s stock control arms are actually incredibly durable. If the Jeep is stock, chances are they are probably fine. We’ve actually seen more rapid joint failure with cheap poly bushings (common on budget lift kits). Basic suspension neglect can cause an otherwise solid Jeep to drive and sound terrible. Suspension joints and even complete systems are pretty inexpensive these days for the TJ. Use the previous owner’s neglect to make your dollar go farther.