This principle has rationity abviously in the perfect property right system, maintenance the party's property right benefits, lower the bargain cost etc.

该原则在完善物权体系、维护当事人物权利益、降低交易成本等方面具有重要作用。

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The reputation system of current technical market is not perfect, which makes the bargain cost large and trade the inefficiency and thus limited the extending of market scale.

目前技术市场不完善的信用体系使得交易成本上升，交易效率低下，限制了交易规模的扩大。

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Buyers will bargain hard to cut the cost of the house they want.

买主会竭力讨价还价以压低他们想买的房子的价格。

《牛津词典》

Tickets cost a bargain 15 euros but are popular, so book in advance.

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Aetna must have figured the cost was a bargain in that by the time Hug went to work for the Equitable, much of what he knew would become obsolete.

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"This turns out to be a bargain for the public in terms of cost versus the benefits, " he said.

CNN: graphic