I sell all my RV's on consignment. IMHO the less hassle free way to go.
They really do not take a commission out of your sale.
You decide what you want out of the RV, they add their commission 'on top' of that price.
They will call you on all the offers. It's up to you if you want to accept the offers or not.
You will have a way much wider range of buyers because the dealership can arrange for loans. A 4sale by owner can't.
AND they handle all the financial transactions. I.E. they take in the money and issue you a check from 'them'. You do not have to worry about scams, counterfeit cashiers checks, and limiting yourself to only buyers with cash.