Here's a great 16 minute audio clip [http://www.npr.org/player/v2/mediaPlayer.html?action=1&t=1&islist=false&id=167802325&m=167805240] from NPR's Planet Money blog [http://www.autoblog.com/2012/12/30/how-a-hostage-negotiator-buys-a-car/] around negotiating techniques the pros use, including: * The "nibble": How a guy