The 1993 RT/10 Vipers are just not worth what people think they are worth. This is not a knock against you or anything, but the 1993 Viper and the Generation I Vipers are not desirable at this point in automotive history. The second generation Vipers improved on the shortcomings of the Generation I Viper, and they have also becoming THE ICONIC body style of the Viper. Now, if we wait another twenty years, we will see the value of the Generation I Vipers, along with subsequent generations, increase significantly in value. Since the Viper will no longer be produced, at least under the Dodge brand, the value of all existing Vipers will increase as soon as automotive experts specifically address the greatness that is the Viper. I, along my with family and friends, are DIE HARD Viper fans, but the hard truth is that we are currently in an era where the Viper is somewhat of a forgotten car with the likes of today's high powered Mustangs, Corvettes, and Challengers (see the Hellcats).
I have great faith that the Viper will join the ranks of classic desirable automobiles to the point where they will be worth quite a bit of money.
On the other hand, cars that end up selling on Mecum, at least for the higher end cars, sell for much higher than their true value. People typically overpay in Mecum and Barrett Jackson automotive auctions except for the first two days where great deals can always be found.