Gotta tell you... this smells fishy to me. Without seeing a title and knowing that the person with whom you are dealing holds said title, I wouldn't do anything. Who knows if this is a stolen camper, or simply a loaned camper to which the "seller" has no legal right? Why doesn't the "seller" have the title in hand, or at least a copy of the title marked with a lien?
If I was to be involved in this transaction, it would occur at the seller's financial institution. I would demand a clear copy of the title by issued immediately upon payment. If the financial institution holding the title refuses to immediately clear the title, I would demand that the money be placed in some type of escrow account and not cleared until you receive title.
As it stands now, there is nothing to prevent the "Seller" from taking $6000 from you and walking away, never to be seen again. You would have no paperwork proving that you made a legal purchase from the legal owner of the camper.
Be VERY careful...
