drive a bargain
drive a bargain {v. phr.}
1. To buy or sell at a good price; succeed in a trade or deal.
Tom's collie is a champion; it should be easy for Tom to drive a bargain when he sells her puppies.
Father drove a hard bargain with the real estate agent when we bought our new house.
2. To make an agreement that is better for you than for the other person; make an agreement to your advantage.
The French drove a hard bargain in demanding that Germany pay fully for World War I damages.
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Source: A Dictionary of American Idioms
