Tis pleasant purchasing our fellow-creatures; And all are to be sold, if you consider Their passions, and are dext'rous; some by features Are brought up, others by a warlike leader; Some by a place--as tend their years or natures; The most by ready cash--but all have prices, From crowns to kicks, according to their vices.

The Works of Lord Byron Complete in One Volume (ed. 1826)