As already said, this is most likely a case of someone who for one reason or another, is extremely 'upside down' on their loan - They owe far more for their unit than it is worth, and are trying to get enough selling it to pay off the loan. Not uncommon at all.
That, or they just have no clue what their RV is truly worth, and are looking for someone dumb enough to over-pay for it (like they may well have done originally). :)
I don't think I'd ignore the ad completely, if I liked everything else about the unit and was in the market for such. I would ask them if they are willing to negotiate on the price, and try to *politely* inform them, by providing various links to NADA, comparable units for sale, etc., that they are asking considerably more for their RV than it is worth.
If they won't budge and be more realistic, well, easy enough to just move on and keep looking. :)
