We sold our 2013 Jayco WhiteHawk on consignment with the dealer we originally purchased it from. A different experience; we weren't asked what we wanted for it but rather what we would like to receive for it. The sales manager looked in a reference guide and suggested $7K net to us would be reasonable. We agreed, it sold in less than a week.
I don't know what it sold for but the sales manager based the 7K to us on the wholesale value which she stated was $10600, about 3-4K below the NADA retail numbers I had looked up for our trailer. I'm sure the dealer did well, all I know is we wanted the trailer gone, it was costing us about 350 a month in storage and insurance, and we were not using it.
Side note, dealers will take a unit on consignment with a loan balance, but prefer a 'clean' deal, meaning free and clear with clean title & nothing owed.