Yeah, me too. Or I look at the replacement value of what I would want, which is usually something in the $20k range to replace my 300E. $20k can buy a lot of brakes and oil changes.
I routinely spend up to, or more than, my car's value on maintenance every year, but the thing's paid off, it drives pretty well, is roomy and comfortable, and I don't care if it gets dinged or scratched anymore. I'm hoping to nurse it along until some real high dollar set of repairs is needed, and then replace it with another long-term keeper.