Merriam-Webster's Collegiate® Dictionary, 11th Edition
BARGAIN
I. noun
Usage: often attributive
Etymology: Middle English, from Anglo-French, from bargaigner
Date: 14th century
an agreement between parties settling what each gives or receives in a transaction between them or what course of action or policy each pursues in respect to the other, something acquired by or as if by bargaining, a transaction, situation, or event regarded in the light of its results ,
II. verb see: bury
Date: 14th century
intransitive verb to negotiate over the terms of a purchase, agreement, or contract ; haggle , to come to terms ; agree , transitive verb to bring to a desired level by bargaining , to sell or dispose of by bargaining, bargainer noun