Doug, the problem doesn't lie in the negotiability of our product, it lies with our methods. Real estate is negotiable and yet real estate agents are seen to be fairly trustworthy. Their national association even made a word, REALTOR, trademarked it, and after 60 years it caries a degree of trustworthiness and professionalism that must of us would kill for.
I'm in agreement with Ryan, transparency is our friend. As much as the old school folks want to keep customers in the dark, transparency will win out. Dealers that embrace the internet and transparency will win customer trust in the long run.
You are negotiating through a realtor to an individual and not directly with the source.
There have always been more honest people, than crooks, in the car business. As long as the crooks exist, our reputations will continue to suffer. I assure you the old school is alive and well in Phoenix.