Man! Your post is quite the challenge to read! (No pun intended)
Ok so obvoiusly this salesman is ... mis-informed. (I'm being nice becuase anyone selling a $40,000 car should know their product.

)
I have talked to some Dodge dealers that will not charge over MSRP because they know it will affect customers opinions in the future. They have moved a lot of SRT's becuase of this.
We are dealing with the laws of supply and demand here, just like every time a new play station comes out. If you want it bad enough and have the money then buy it. If you are Po or just cannot rationalize paying $50,000 for something that is worth $40,000 then don't buy it!
If I were selling...sponges and they came out with a new super sponge and everyone wanted it I would charge what the market can bear. It's called a free market society, one of the features of the USA.