I have been tossing around buying a new Chevy 2500 Duramax. Everyone's price seems to be about the same. Dealer invoice minus rebates. Does anyone know if they can do anything better on the price of these trucks? I have gotten some incredible deals on the 1500 Chevy's over the years but hard to find one on the 2500 diesel. Does gm just not allow them to drop the price any lower? Or do they just know that they will sell it anyway?