If you cannot make a counter offer, then I'm afraid we can't make a deal.
如果你不还价的话,恐怕我们无法交易。
A man cannot whistle and drink at he same time.
一心不能二用。
When we use a phrase like 'it serves him right', we are, in part, admitting that a certain set of circumstances has enabled justice to act of its own accord.