5. Can it be cheaper?
能便宜一点吗？
还能这样说：
Can you reduce the price a little?
Can you come down a bit?
6. Have you got anything a little cheaper?
有便宜一点的吗？
还能这样说：
Do you have something less expensive?
Have you got any that cost less?
谚语：
Gold will not buy anything.
黄金并非万能。
7. Lower the price, and I'll consider it.
价钱低一点我才会考虑。
还能这样说：
I'll consider it if you cut down the price.
If you reduce the price, maybe I'll take it.
应用解析：
consider well over the matter 好好考虑这个问题；
consider from different standpoints 从不同的角度考虑；
consider the feelings of others 体谅别人的感觉
8. I can't afford this new computer.
我买不起这台新电脑。
还能这样说：
I don't have enough money to buy this new computer.
This new computer is beyond my purse.
应用解析：
afford sth. (to sb.) 供给某事物，给予某事物。
例如：The story books afford pleasure to me.
故事书给我带来乐趣。