一般情况下在美国商店里买东西是没有讨价还价的。但很多情况下是可以的。比如美国人的garage sale，大街上的交易或跳蚤市场里的交易。 特别是有当你买大东西的时候，比如房子、车子时一定要记得和对方讲讲价。不然你就亏大了。
下面列举的是议价时可能用到的句子：
how much is this？
how much will that be？
how much are these altogether？
i think this is too expensive.
that's little too much for me. could you make it less for me？
i can't afford it. this is too much.
this is not a reasonable price.
i don't have this much cash on me. will you make it little cheap？
what's the regular price？ do i get discount on this？
tell me what's the best price you can do for me？
if i pay you cash， will you give me some discount？
i'd buy this if you can make it a little less expensive.
i'd buy it if you reduce the price a little.
may i have a discount on this？
will you give me a discount？
can i have a discount？
would you give me a discount if i buy three of these？
i've come all the way from china； please give me a better price.