砍价谈折扣

A: I noticed this has a small scratch. Any chance you could knock something off the price?

B: Hmm, I can do ten percent off. That's the best I can do.

A: What about fifteen? It's pretty noticeable.

B: Tell you what — I'll throw in free delivery.

A: Deal. That works for me.

B: Great, let me write that up.