You can always bargain here, but goods tend to come and go quickly so if you like it, buy it now!
你可以总在这里讨价还价，但是商品似乎来去得快，所以如果你喜欢，现在就买！
The potential is always there, and sometimes these things can come on pretty quickly.
可能性总是存在的，而且有时候这种事情来得相当的快。
This concept can be compared to keeping three hungry dogs who are always trying to get out of a cage, and three who are well fed and come quickly when called.
这个概念可以与下面的故事相比较：你照看着六条恶狗，其中三条经常挨饿，总想跑到笼子外面；另外三条被喂养地很好，一叫它们，它们就很快过来。
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