This article, in the view of theory of game, attempts to set up the negotiation price model of international negotiation and seek an optimal price through organizing and analyzing information and…

可以从博弈论的角度，建立国际商务谈判的议价模型，对信息进行组织、筛选，寻找一个最佳的价格点来分析谈判双方应采取的策略。

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The price is not open to negotiation.

价格不容商议。

《牛津词典》

The price is generally open to negotiation.

一般来讲，价格可以商量。

《牛津词典》

Go to any Middle Eastern bazaar and half the joy of a purchase is the negotiation of the price.

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In particular they say price negotiation is a skill that many people think they have, but in reality do not.

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Mr. JOE ANTOS (American Enterprise Institute): Price negotiation by the government for prescription drugs is a great sound bite but it's not a good policy and it basically won't work.

NPR: Democrats to Push for Medicare Changes