I have always used Craigslist to sell my vehicles and trailers.
But since you're in NJ and RVDirect is HQ'd in NY, check them out first. They have at least two sticks & bricks dealerships in NY. See what kind of tradein deal you can get from them.
They and RVW have been the biggest online RV dealers for years.
and Zoe the Wonder Dog(R.I.P.)
'07 Roo 23SS pushing an '07 Chevy Avalanche
Equalizer WDH and Prodigy BC