I just bought this from the dealership (Jim Audi of Atlanta) back in April 2008. I'm the second owner of this vehicle.
I bought the extended warranty which covers engine/tranny (3/36k).
I'm not sure if the warranty is transferable but it should be but I'll check.

Specs:
4 door
silver exterior
gray (seats) and black carpet
6 speed
74k miles
everything is stock except for a legal tint (state of AL)
everything works !!!
70% tread on tires
Asking price: $13k neg

Why am I selling? I used to own a bunch bimmers and thought, hey why not an S4.
Well, after getting out of my old E36 M3 and driving this S4, it was noticeable in the driving characteristics.
I prefer my M3 over the S4 in the fun factor but the AWD of the S4 will keep you safe. Hence, I'm going back to the bimmer family.

If trade, I rather have a mini cooper s or 3 series bmw or X5.
I'm willing to put some cash along with my the S4 if your vehicle's value is greatly more than mine.
(Your car must be under $20k value..I don't want to fork out that much cash for it)

Please email me at "mcbk1452@hotmail.com" instead of PM.
I respond quicker.