I very nearly bought one of similar year model. I'd organised finance and found the very one - a beautiful example with stage 3 everything and low mileage. It was an absolute weapon, and felt truly amazing to drive.
It was the day before I went to pick it up and it started raining hard, then a little harder, and then very hard indeed.
All of the exit routes from my home to the highway went a little bit underwater. This wasn't a problem on the way out of course, because I was driving a 4x4 with a snorkel. I then realised that if I pick up this beautiful little S4, I will end up staying at a hotel for a day or 2 until the water recedes. This led to the realisation that every single time it rains heavily I will either be stuck at home (WINNER!) or unable to get home.
I called and cancelled the sale, realising that I was geographically stuck driving 4x4's until such time as I no longer live where I live.
I often think of that little S4, and how on earth a tiny 2L engine could deliver the level of insane power and refinement in drive. Alas it was not to be for me, and a supercharged toyota FJ cruiser appeared in my garage instead - but I still long for a day when there's a garage with an S4 in it.