The average U.S. light vehicle price was $30,303 in April 2012, up $1219 from the prior year. Incentives were also lower, down $146 to average of $2,446, according to TrueCar.com. This is happening even though cars account for a greater portion of sales of light vehicles. Used cars and trucks prices increased by 3.2% in March over the prior year, according to the Labor department data. Pent up demand is part of the reason. Another reason is the discipline exercized by auto manufacturers, especially the Big Three, in not letting supply exceed demand and therefore not having to offer higher incentives to get rid of inventory. These practices of oversupplying the market hurt the Detroit automakers in the period before bankruptcy, especially GM. Increases in used car prices and higher prices of new cars create a virtuous cycle for automakers to support higher margins. With the high retirement and healthcare costs reduced through bankruptcy and new agreements with the UAW, the Detroit automakers are now better positioned in the market to sustain margins by limiting production to demand. ...