How much does this vase cost? 这个花瓶多少钱？

$20. 20美元。

$20! It's too expensive. How about half the price? 20美元！太贵了。半价怎么样？

Half? Are you kidding? 半价？开玩笑嘛？

Can you lower it, please? 能便宜点吗？

How much is the silk skirt? 那件丝裙多少钱？

50 dollars. 50美元。

Well, I think the price is a bit high. Can you lower it, please? 嗯，我觉得价钱有点高，能便宜点吗？

I'm sorry, but this is one-price shop 很抱歉，但这里不打折。