I checked the NADA prices for you. The basic list price for your unit was $86,199, low retail is $52,700 and average retail is $63,500.
If you borrowed to buy this coach, you likely will be upside down on your loan and will also have a lien on it. If you check my profile page, you'll find an article that explains what you can do about this situation. Bear in mind that the asking price will depend on the condition of the coach, and that selling it will be difficult if there is a lien.