Right now I am sans-car due to some poor timing (or perhaps good luck) with selling my S4. I had planned to get the new car right before the Audi sold, but due to some really terrible dealer salespeople I didn't get anything. The Audi sold REALLY fast -- first guy to come see it gave me asking price, and didn't even want the snow tires I would've included on a separate set of wheels.
So yesterday the guy took possession of the Audi and now I am without any transportation. At least I have a ton of Hertz points saved up. Oops.
So, life lesson: don't sell your only car until you get the new one, unless you want to walk everywhere or rent something.