IMO, craigslist is your best bet. Be sure your ad is very detailed, and put lots of pictures in it. While it is true that ALL RVers do not browse CL, many do.
Another possibility is Facebook Marketplace. Again, be very detailed in your ad, and post pictures.
RV Trader is another place to look.
IMO, you should be honest about the odometer mileage not being the actual miles on the vehicle. Tell prospective buyers about the towed miles.
Good luck.
CM1, USN (RET)
2017 Jayco TT
Daily Driver: '14 Subaru Outback
1998 Dodge QC LWB, Cummins, 5 speed, 4X2
2 Kawasaki Brute Force 750 ATVs.
Pride Raptor 3 wheeled off-road capable mobility scooter
"When seconds count, help is only minutes away!"