I think there's a number of variables in today's market that we haven't experienced in previous years.
1. Sales of new RV's continues to be hot. So, dealers less inclined to negotiate prices on new RV's. They still negotiate, but much harder to get the significant reductions from MSRP that have been routine in the past.
2. Hot market for used RV's. That plays to your advantage here in that as long as you ask a reasonable price for your RV, never a better time for private sale than now.
3. Inventory shortages. I don't know how it is lately, but there's been a real demand on inventory. So, makes finding a replacement harder.
If it were me, I would consider selling it separately. Depending on what you can sell it for, you will offset most, if not all, of the tax benefits to trading in. Work up a small spreadsheet to figure the tax reduction on a 15K trade, and then make sure you sell it for at least that much over 15K. Will be a net increase to you.
If it doesn't sell quickly, you can always still trade it in. Worth taking a shot.
Mike
Im Mike Willoughby, and I approve this message.
2017 Ram 3500 CTD (aka FRAM)
2019 GrandDesign Reflection 367BHS