这个多少钱？ How much does it cost?
太贵了 It is too expensive
你们有便宜些的吗？ Do you have anything cheaper?
能请您包装成礼品吗？ Can you wrap it as a gift, please?
我想买一条项链 I am looking for a necklace
有打折的吗？ Are there any sales?
你可以帮我先留着吗？ Can you hold it for me?
我想换一件 I would like to exchange this
我可以退货吗？ Can I return it?
有瑕疵 Defective
坏了的 Broken 