You enter a car lot. Even after ducking and dodging between cars, that sales person has managed to grab you. Thus begins the interrogation.
Nicely, but firmly, let the sales person know that you are only interested in looking. If they continue to follow you around and ask you about your needs, remind them you are doing some research first. Say thank you, and ask for their business card. Let them know if you need assistance you will look for them. If they continue being persistent, stop and look them in the eye. Tell them this is the third time and you are now becoming annoyed. You really want to look on your own. Let them know that if they bother you one more time, you will look for another sales person should you need the help. You do have a choice as to the sales person you wish to work with.
Once you have decided to make a purchase, stick with your own decision. If a sales person keeps trying to steer you towards a larger or more expensive purchase, tell them that you know what you want and what you can afford.
Do not let a sales person use sales lines. If you are told that the automobile is being saved for someone else, ask them why they are showing it to you. Let them know that you know the games that are played, and you refuse to play them. Tell them to be straight-forward and honest with you, and you will do the same for them.
Never take anything at face value. Everything is negotiable. Let the sales person know that you know that. Do not get talked into paying more for something than you should.
Always be willing and prepared to walk out of the store. Let them know that you have the leverage and the control in the situation. Never let them know that inside you are drooling over that ten-year-old cherry Mustang that just arrived on the lot.
Remember, you are the one spending the money. You are doing them a favor, not the other way around. Keep your cool and show them who is really in control.