hi op, at the end of the day its basically a game to them on how much they can extract from a customer. if they detect any vulnerability or have the upper hand, or have you cornered, u know they got u. unfortunately its the nature of the beast.
to get a good deal, us customers have to play the same game. however catching dealers at those positions are not often, but do exist tho.
i've seen a guy bought a new kr for $120k cash and a week later the same dealer sold their last kr to another for only $75k. back them $75k was heck of a deal. who know what they were pumping to the guy with the $120k and he got suckered in. he later met the $75k dude at a car show and found out the price. he went back to the dealer and complaint but guess what, the dealers had nothing to say beside laughing behind his back all the way to the bank.
at the end of the day, they were able to extract that $120k from him and can sleep very well. that's just how it is. the 120k dude doesn't go on forums, not very knowledgeable, no homework done, not very savvy and no research. and it played to the dealers hand perfectly.