The Collaborative International Dictionary of English v.0.48:

Chaffer \Chaf"fer\, v. i. [imp. & p. p. Chaffered; p. pr. &
   vb. n. Chaffering.] [OE. chaffaren, fr. chaffare, chapfare,
   cheapfare, a bargaining. See Chaffer, n.]
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   1. To treat or dispute about a purchase; to bargain; to
      haggle or higgle; to negotiate.
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            To chaffer for preferments with his gold. --Dryden.
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   2. To talk much and idly; to chatter. --Trench.
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