LEV401 A salesperson is not expected to be objective and impartial, and the customer knows that the product description, even if accurate, will also be one-sided. But a sales person who says something like "I advise you to take out this plan" or "This plan really suits your needs" is putting on the hat of the expert adviser; such advice need to be completely objective. We learn this from the verse, "Do not put a stumbling block before the blind." Rashi explains that this refers to someone who is "blind" to the bias of the advisor: "Do not advise someone to sell his field and buy a donkey if your true intention is to acquire the field for yourself." In general, sales people need to avoid giving advice. Aside from the fact that it is almost impossible to maintain the proper objectivity, sales people are not always experts on the merchandise they sell, and often they are not really qualified to provide advice.