It's really a good bargain. 真划算啊。

A:Can I help you?
有什么需要帮忙的吗？
B:Yes,I want to buy a necklace as my wife's birthday gift?
是的，我想买一条项链作为妻子的生日礼物。
A:How about this one?
这个怎么样？
B:It looks great.How much is it?
太美了，多少钱？
A:5000yuan.Do you have a membership card?
5000元，请问你有会员卡吗？
B:No,I don't.
我没有。
A:Why not apply for one?If you apply for a membership card at 40 yuan per year,you can save at least 2000 yuan.
为什么不申请呢？如果您每年花40元办理一张会员卡，你至少可以省下2000元。
B:Why do you say so?
为什么这么说呢？
A:Because you can get 10% off with a membership card.
因为如果您有会员卡可以给您打九折。
B:Do you mean that I can only pay 4500 yuan if I buy this one?
你的意思是如果我买这个只需要4500元？
A:Yes,you're right.
对啊。
B:It's really a good bargain.I will take this one and apply for a membership card.
真划算啊，我买这个了，并且办理一张会员卡。