Take it to a great tech for an inspection. These cars are fairly simple mechanically and a good tech can give a full diagnosis pretty quickly. He can probably even tell you what "needs" to be replaced and give you some further room to talk the dealer down. The 2.6 if well-maintained will spin 200k miles no problem. I'd pay attention to oil burn, water pump, climate control and tranny condition. Wear parts like brakes/rotors/flex discs/engine mounts/shocks (etc) are cheap.
If the dealer resists spit on him and walk away.