We're in a recession. That's all there is to it.
Bill Elliott's Viper, a '00 GTS with 1000 miles, sold recently at auction for 55K. I know the buyer (a wholesaler). He thought it was worth only 50K, but went an extra 5K due to the ownership history.
Look at the bright side: "new blood" in the Viper nation due to more affordable cars!
Hell, the price of everything is down these days, except for real estate, booze, and cigarettes!