I would estimate it's fair market value at $125-$135K. Find out the original selling price or the MSRP. If MSRP, subtract 25% and use that number as the selling price. Then for each year subtract 7% for the first year and 5% for each subsequent year. That should give you a pretty fair retail value.
Good luck and btw, your tires are still good for another 2-3 years. Michelins are expensive but you can get substantial discounts if you join FMCA.
Roger & Mary
2017 Winnebago Navion 24V (Sold)
2014 Tiffin Phaeton 36GH (Sold)