When I was buying used, I consistently found sellers who couldn't fathom that their unit wasn't worth what they thought it was. And when I was selling our used coach, I couldn't fathom why no one thought my price was a 'steal'. :)
If that's a popular model, and if you don't need to unload it fast, then - yeah - maybe you can get $51K back. Of course don't forget the money lost on registration and taxes. That's not coming back.
You'd want to sell it around early Spring when folks are thinking about camping.