Sales trick

Sales tricks which range from just moving things here and there to attract attention of customers which is harmless to something which is deceiving as in someone walking in and suggesting that the product is good when he is actually part of the team to which the sales guy belong. Discounts are the new form of sales trick when the prices are doubled and are given 50% off.
It turns mathematical trick when it is on offers like Buy 2 get 2 Free two of the least price ..... it is just that it is not 50% discount, although they may it appear like that.