Always off invoice and never from MSRP. You can find MSRP and invoice pricing on web sites such as nada.com, edmunds.com. kbb.com, etc. Go on one of these and build the truck you want, print that out, with the MSRP and invoice pricing shown, and show that to your dealer. The dealer can sell for the invoice price and still make some profit as there is a thing called dealer holdback that is money the manufacturer gives to the dealer. Some dealers will order one for you for the invoice price. Some for a few hundred over. And check to see if the manufacturer is offering any rebates. That should come off the negotiated price above. Shop around. Different dealers will make different offers.
And the best times to buy are the last day of a month, the last day of a quarter, and best of all, the last day of the year. Dealer is trying to make monthly, quarterly, and yearly sales quotas for extra compensation from the manufacturer.
