I use to have this problem from time to time. But it hasnt happened at all since I did 2 things to tilt it in my advantage.
1) I do as much research about whatever product I intend to buy and its different competing brands for that product. (The higher the price I will be paying, the more anal I become in learning as much as possible). Why do I do this? Do I really need to know all this shit? Yes. Going into a store with all the knowledge is the smart thing to do. That way when they start their sales pitch, you will know if they know what they are talking about. Over half the people I have dealt with dont know shit. I love going into a store and putting a sales person on the spot by asking them questions I know they dont have a clue about regarding a product. Especially after they have "tried" to get a sale out of me.
2) If Im just window shopping because I happen to be there, with no intent to buy, (no research, etc...), and a sales person ask me if I need help, I come right out and tell them "I dont need help and if and when I do, I will come get you. Till then, your just wasting your time". This might sound like Im being rude. But when you just dont want to be bothered with sales pitches, its better to just be up front about it. Their time and mine time arent wasted.
If neither one of these tactics are your cup of tea. Watch Larry David tackle this very same topic on
Curb Your Enthusiasm, and see about trying this.
