5. Our price can't be matched.
我们的价格无人可比。
还能这样说：
There is no one who can match the price with us.
Nothing can be comparable with our price.
应用解析：
find/meet one's match in sb. 遇到不比自己差的对手。
例如：
He thought he could beat anyone at tennis, but he's met his match in her.
他以为他打网球所向无敌，但遇到她却是旗鼓相当。

6. The original price is 89 RMB. Now it is much cheaper.
原价是89元，现在已经很便宜了。
还能这样说：
The present price is much cheaper than the original one 89 RMB.
Compared with the cost price of 89 RMB, the current price is much cheaper.
应用解析：
original house 娘家；
original idea 新颖的意见；
original sin 原罪

7. We have to ask for another price reduction.
再给我们优惠点儿吧。
还能这样说：
Could you please lower the price another?
May I ask you to cut the price a little?
应用解析：
like another 普通平常的；
one another 彼此，相互；
taking one with another 权衡利弊，总体来说

8. How about a discount of 20%?
打个8折如何？
还能这样说：
Could you make 20% discount?
Can you give a 20% off?
应用解析：
get wind of 得到风声，获得线索；
have none of 允许；
fall short of 不及