I just purchased the VX that theericharris is talking about on Autotrader, I got it for 15,500 with 24K miles. I drove 300 miles one-way to pick it up. I have been looking for around 6 months before I found the one that I wanted for the right price. Just remember, good things come to those that are patient. It may be a little more difficult for you if your are focused on a certain color, there were only so many of each color made, so you are limiting your options.

Good Luck in your search. AutoTrader has a lot of Protons for sale, maybe not in your price range, but take a look.