I live in Dallas and bought my new GMC 2500 diesel from Dennis Dillon. I shopped my purchase extensively and negotiated with 4 dealers in the Dallas area and a dealer in Shreveport and one in Little Rock and one in Tulsa. The Dennis Dillon final offer was $6,000 less than the next best deal. I approached that dealer in Plano TX and asked them to match the deal plus $1,500 (my cost to go to Idaho). They would not and said that regional costs vary so much from region to region that they could not. None of the other dealers would either. I left Dallas on Friday and arrived back on Wed in my new truck.