I'm sure we've all had it. You browse a used car site and find what seems like the perfect car. You like everything about it, until you see the mileage. When would you consider the mileage on a car so high you'll just walk away regardless of the condition?

I just found the pictured 1989 BMW 325ix Touring with a 5 speed. It looks like it's in a very good condition for its age. Well maintained too. It's priced as a car in good condition. Then I saw the kilometers: 508,000 (316k miles).

Mileage, when becomes high mileage too high?