I go in knowing what I want, as studied before hand. I generally know more than the salesperson, for example. I'll ask the sales person for the item, if the case. New car buying has to be minimum, 16-18% off msrp, and has to be a Ford or GM. Today's buying for me, other than a car, is on line or phone, for electronics and appliances, for the most part.
0, forgot, I did experience an ordeal in the early 70's at a Pontiac dealer. The salesman wanted me to buy a Firebird and pushed and pushed and eventually landed in the dealers owner office, to explain why I should have. Unbelievable experience. I ended up with a Lemans, which I wanted all along. That's all I remember.