Ask a question and they say, "I don't know," or if you ask them to lower the price because this is the last one and it is damaged and they just stare. The answer of, "I can't do that"....kills me. They can do a lot they don't know. Talk to a manager. Or most places in the mall or most anywhere give a 15 percent discount authorization to most all employees. If your business is customer oriented, most all can be done.
Speaking of discounts, I used to work in a mall in a city with the highest population of Armenians outside of Armenia. At least once a day, I would get someone that was fresh off the boat, and ask for the manager in order to bargain on the price. My feeling is that if you want to haggle price, go shop at a flea market. However, in the case of floor models, I would always give a discount, and make sure that the customer understood that it was sold "as is." Even after doing this, they would still want to comeback and try to get a refund or exchange.
One other pet peeve I have is being told, "Please hold," and then placed on hold. Nothing irritates more than that. Please ask permission to place me on hold, and when you do, please don't tell me, "I'll be back in a second."