1997 v6 chevy camaro, or 2000 v6 ford mustang?

These cars are NOT stellar in terms of longevity. The price seems to be on par for year/miles/problems. I would really pay close attention to the following: Look for leaks - upper/lower intake, valve covers, pinion seal ,ac compressor , ps pump Loud knocking or tapping from the engine when cold - slight knock on cold start up it typical Listen to the rear diff on a test drive - ie.

No radio, no conversation, windows down. What exactly is the mechanic fixing for $1100?