We know two unrelated people who bought vehicles on ebay and were happy with their purchases; on the other hand, sellers have to pay fees that have recently become hefty enough that they've lost a ton of sellers and recently laid off (I think) some 1,500 employees.
We bought quite a bit of stuff on craigslist while furnishing our place here, and we swear by them. By and large it's just local people selling (that is, not businesses, though we did find a few of those). For sellers it's free (a huge plus!), and it caters to local rather than national and even international as ebay does. Our suggestion would be to use both
www.ocala.craigslist.org and
www.orlando.craigslist.org. Ocala is, of course, closer but relatively small, while Orlando, though a bit further, is huge.
Good luck selling the RV!