The Collaborative International Dictionary of English v.0.48:

Prig \Prig\, v. i. [imp. & p. p. Prigged; p. pr. & vb. n.
   Prigging.] [A modification of prick.]
   To haggle about the price of a commodity; to bargain hard.
   [Prov. Eng. & Scot.]
   [1913 Webster]