Thinking of an older S4 for my DD...

[bmx672]

Believe me, I know all about the suspension and other things that can, and will, go wrong with them. The front alone has 8 control arms!
I would definitely have a PPI, but driving it would be the best thing of course. I know every little detail to the car except the twin turbo 6. I'd research the heck out of that.
I think I've been spoiled with mine. My turbo is still flawless! Engine is solid!
Basically I'd sell it with the mods because I do not have the original parts (ie exhaust) etc. or the existing mods are fastened on like bumper real valence etc etc.
My idea is to get a car with 80-100k less miles and still drive it for a few more years. My car now could probably do that anyway, so that's the debate. Other than the S4 being a lot more fun!

[Kirk]

It sounds like you can do any repair work yourself, so I wouldn't worry so much about the maintenance costs. A thorough inspection should get you set. I would question buying such a high mileage example though. I personally would stay away from any used car over 40K miles. The reason being that you really don't pay that much more for a lower mileage example. Then you've got something that is not well worn and which you can begin babying and taking care of properly. I'd look for a lower mileage S4 and go for it!