Applejack, calm down ! Dealers have a right to get what the market will bear. Yes some a bit more greedy than others but remember this is a very low production car, 2036, US., in 2016 to be exact.
The GT350 is far from the typical rarity scenario I have seen before as this car is truly unique and incredibly well engineered. Most of the members on this forum are very happy to even get one and are willing to pay a premium. I believe this car will hold if not increase in value over time. This is far from "any new car " as you stated.
Let people enjoy the experience.
BTW I am not a dealer, I am a 61 year old Mustang guy waiting for my car this Spring. And yes paid a modest premium.