Advertise it in the most well respected full timers club Escapees.
I just sold mine. I advertised it as a set up toad.
You will get tons of calls and RV'ers understand the high mileage not driven aspect of it, and the cost of setting it up as a toad. The regular buyers off other sites won't.
Sell the tow bar and brake assist separately you will get more money that way.
Advertise it here at Escapees Full Timer site.
http://www.rvnetwork.com/You can read the forum/classified without joining the forum but you will not be able to place an ad.
Just join the forum for free.
Scroll way down near the bottom of page to
RV Marketplace and place your ad under RVs, Tows, and Toads for Sale.
Place your ad for the tow bar, braking assist under RV Accessories for Sale
Good Luck!