My experience from about a year ago: I live in a very rural area, so I was expecting problems selling.
I listed our last RV (a TT) on Craigslist (the one covering all of southern West Virginia), at a fair price and included several good photos, in and out. I got several inquiries within a day or two. On Saturday morning, just days after I listed it, a couple showed up at our door unannounced, i.e. not one of the inquiries we had gotten by email. I showed them the TT. The wife offered a price several hundred less than I had posted it at. I replied that I had gotten several inquiries which seemed serious and that I was not yet prepared to move on price. Husband pulled a big wad of hundred dollar bills out of his pocket and counted out the amount I was asking. I got the title and signed it. Helped him hitch up. Done.
A couple of days later, I got a call from one of the fellows who had inquired earlier. He was much disappointed that it had been sold already.
Craigslist seems to work, even here in the boonies. Price is right, too.
Wayne