Several questions come to mind. Has the timing belt been changed? Is the complete owners manual set there? Check the service book that shows all service done on the car. (Timing belt is due at 90K miles.) Has the power steering leaked onto the alternator? That's a common problem. I would still suggest a pre-purchase inspection, especially if you know a good mechanic. If anything, it might give you some bargaining leverage. If nothing else is wrong, I'd happily give them 7,000 cash. It would have to be mint, with new belts/hoses/bushings/gaskets for me to pay 89K. (But when I was shopping for mine I saw asking prices from 5900 to 10K and mileage from 50K to 240K. By the way, did it have the tool kit in the trunk? Finally, I assume you've already seen this: http://us.lexusownersclub.com/forums/topic/11775-common-issues-and-a-ls400-buying-guide/