Viper pricing is like most things. Different every day.
The only way to buy a Viper is to pay it's going price on that specific day.
Some have better bargaining skills than others, or are willing to settle for one that is not their first choice, in order to score a bargain.
Before they are in dealerships they are one price. People want the first one, and have anxiety about waiting. Kind of Jonesing for being the first to be able to get one.
When they get into dealerships, they have another price, as the marketplace begins to work. Some dealerships charger over sticker, some at sticker and some under sticker. Just depends on the beliefs and motivations of the dealership. Many many cars will bring over sticker due to supply constraints. If you want one NOW you will pay more. If you want to wait, you may get a better price, or in the case of a hot issue, you may be able to get nothing at all.
When there are bunches of cars available, and not many buyers, again, that is a different price. You can play one dealership off another to get a better price. In the case of Vipers, the factory made many identically equipped editions such as Launch or Track Pack models. Since all the dealerships had the same showroom stock, people could shop around. The buyer got in more control of the pricing than the dealerships.
Later, SRT began to turn out more options, and every dealership had only a one, or a few cars, each with different equipment. Those dealerships that got the popular items right, could demand premium prices. Those dealership that maybe ordered too many options needed to discount them a bit.
Now there are some unsold 2013's still on dealers lots. These tie up money and incure holding costs. Obviously they will be more willing to deal on these models. The T/A have turned out to be a very desirable package, and these will command a premium price for those lucky enough to score one.
When Convertibles or ACR's get released they may also command premium pricing, as they will be limited at first, with pent up demand. With SRT controlling production volumes, prices may come back into line with suggested retail pricing.
So every day, for every car, there is a different price. Some gloat about getting a better deal than others, and some are just happy to be the first guy on the block to be able to own their dream car.
Nobody should care a bit about what someone else paid. It's their money and in this country, people are still entitled to spend their own money in any way the please.
It reminds me on an old quote about a guy that came into a bunch of money. When others asked how he spent the money, he replied "I spent some on Women, Whiskey, fast cars, cigars and gambling...the rest of it, I wasted.