I can see from the VIN that it is a real Cuda (from the S), that it is a real 340 (from the H), and it was made late in 1971 (from the last six of the serial number). Without knowing more, I'm guessing that a really nice version of this car could go for 50k in the right market if buyers are feeling like buying. Do you have other details on the car?
I envy you being able to go to the show to buy like this. That would be great fun! If you can, try and inspect the car well for signs of corrosion and for number verification. A lot of these cars are running engines that are period correct but no longer numbers original to the car they are in.
The advantage you have in this case is that at higher prices (like this car will be), there won't be a lot of guys able or willing to pull the trigger on a 50k toy. I'd be surprised if there isn't a high reserve on this car and it goes unsold.