If you are upside down or close to it chances are it isn't going to sell. My experience is it has to be bargain basement price or the next guy that has his priced lower will get the sale. Unfortunately too many people pay way to much, finance them for way to long and don't have any equity when they decide to bail out. Wish I could paint a brighter picture for you. Shop the internet for one just like it and see where they are priced. Often you can find new for less than used.
2015 Chev Silverado 3500 dually D/A
2016 Cedar Creek 36CK
B&W Patriot 18K, Trail-Aire pinbox,
Level up, dual panes & all that stuff...