提供一段对话作参考
Dialogue Script  对话原文   
Tom: Hi, how much do you want for this? 
Saleslady: 150 RMB。 
Tom: What! Don't try to rip me off! I know what this is worth。
   50 RMB, tops。 
Saleslady: No way! It cost me more than that。 (grabs a calculator) 120 RMB。 
Tom: Come on! If you don't give me a better price, I won't buy this from you。
   
Saleslady:110 RMB。 Take it or leave it。 
Tom: (takes the calculator and enters 55) I'll give you 55 RMB。 
Saleslady: I can't do that。
   I have to make a living。 Give me 100 RMB and it's yours。 
Tom: That's still much too expensive。 (starts to walk away) 
Saleslady: Wait, wait! OK, 85 RMB。
   Final price。 
Tom: If that's the lowest you're willing to go, I'm leaving。 I'll pay 65 RMB, final offer。 
Saleslady: You drive a hard bargain。
   I'm losing money on this, but alright。 I'll let you have it for 65。 
Tom: (pays the money) Thanks a lot。 See you next time。
   
Saleslady: Bye。 
详解见
 
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