I can confidently tell you that he isn't selling the car because it needs something; he still drives it daily and it seems to be in great shape. At least by my judgment.

I've been out of the game for a couple of years so correct me if I am wrong, but these cars have chains that last long. The engine has just 87K miles, so isn't it premature at this stage to be expecting the timing chain to have been replaced?

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1999 Mercedes-Benz S600, 103K miles - garage queen
1988 Mercedes-Benz 560SEL, 89K miles - daily driver
2007 Hyundai Sonata Limited, 31K - daily driver