Other forms: hagglers
A haggler is a person who argues or bargains over the price of something. Hagglers shopping at yard sales can often walk away with armfuls of clothing and books for just a few dollars.
If you try to sell your old TV for a hundred dollars, but you eagerly bargain with a buyer who offers you fifty, you can both be described as hagglers. To dispute about how much something should cost is to haggle, a verb which started out around 1570 meaning "to cut unevenly," and by 1600 also meant "argue about price." Both words come from the obsolete haggen, "to chop."