It's already been sold once. Somebody got all or nearly all "new" dollar for it. I'm surprised they can keep a straight face when quoting the price to you!
This is a used unit, no matter how "lightly". And I'd add that mileage is no measure on an RV- could've been driven to a destination once and lived in for the entire time the owner had it. Using all those fancy options, too.
And it's the first of October, fer cryin' out loud! I think you said you get a lot of snow where you are- do these guys expect to sell a whole lot of RV's in the next few months, including this one?
Offer 30% under that so-called asking price if you're truly interested in this particular unit.