Best dealer to buy a used pick up truck in Raleigh, NC area?

Tips to negotiate with sales persons? Ford, Toyota, GMC, Chevy, Dodge? Why there are more Dodge Rams than any other in the market?

All of them and none of them. It's your duty as reasonable consumer to do your research. As long as you know what the current market value is of any vehicle you are considering you will never go wrong, regardless from where it is purchased.

http://www.edmunds.com/appraisal/