He paid the merchant's price because he did not have time to haggle.

The opposing political parties often haggle over the particular language in a Congressional bill.

I got a lower price because the merchant was willing to haggle.

Haggle does not mean the same as argue. Haggle means a period of persistent bargaining. Argue means to express diverging views, typically in an angry way.

Haggle means to debate to make a deal. Example: Haggling over the price of a car.

The old lady continued to haggle with the fruit merchant over the price of peaches.