I went today to buy a Ford 450 4 x 4 crew cab diesel Cab abd chassis. I was going to trade in my 2007 Dodge. 18000 miles. bought in November. Price for the Ford was $40,000.00 after rebates. I owed $38,000 on my truck, but NADA listed tradein as $30,000.00 retail at $34,500.00. I so I knew...