I just ask for invoice less rebates. If a dealer isn't happy just getting the 3% holdback on a $70K+ truck find another dealer. If you really want to grind them ask them to dip into their holdback $.
We all see these prices listed that seem too god to be true. Then you call or go there and they ask "are you a recent grad"? No, oh well theres $500 you don't qualify for. "Are you police or Fire" No, oh theres another $500 you don't qualify for. Oh, you don't have top tier credit, sorry you don't qualify for ford credit. It goes on and on.
Being in business myself I understand what it takes to operate a business. I have no problem letting the dealer make a little money. A LITTLE, lol....... They also have incentives from Ford that may make certain dealers deeply discount their trucks. In fat, they might even lose money on some of them just to get certain sales levels that help their bottom line. Its all a big rats race.