High pressure salesman. Give you a price and then ...

High pressure salesman. Give you a price and then changes it at the last minute if you do not make the deal. They say they want informed consumers, but they do not. They have no interest in you have an understanding what others offer, they just want you to buy their windows now. The salesman said it was the norm in the industry, but maybe it would be better to break the norms. Take care of your customers, and offer the best price with the chance to compare.