etiquette

I am planning to use a car broker. Since I need to get a demo ride from a dealer any suggestions on how to approach the dealer. Do I just act like another walk in and get a test ride? Thanks

If I just want to go out and sit in some cars I am obligated to stick with the first sales person I talk to if I decide later to proceed with a purchase? Once I am ready to pull the trigger I would like to go through the internet bid process, or AAA, Trucar or some other method. Do I complicate...