I would advise that most dealers who sell a few Vipers will come down 1k to 2k off list price. It is nice to buy local (at least I always try to) but the dealers mentioned give good deals. It never hurts to ask, and it always helps to pay cash on something like the Viper.
The 2001 RT-10 I just purchased is a great machine! I like it more than my 98' I just traded in. The ABS brakes are really nice, and I think, a big improvement.
Finally, concerning the price, I can tell you that I have never had a car hold it's value like the Viper did. The trade in was so reasonable, I was very surprised and proud. If you can buy new, I wouldn't be surprised that you would get 85% of your purchase price back in a year if you decided you did not want the Viper. Try to find another car that will return that! This is just my experience. You will enjoy whatever you end up buying.
Jim