Auction purchases are where is, as is. Unless you are very familiar with auctions and rv's, know the real market value of what you are looking at and are willing to take a risk it is not a good idea.
Auctions can be fun, I enjoy watching people bid. Some come in with no idea of what they are bidding on and get burnt. Others just have to have it regardless of cost. Some have to 'win', they can't stand the thought of being beat out, of losing. I watched two dirt bikes go for over $200 each, both were beat, missing parts and one had frame damage. Young guys with too much money and no common sense. A fully dressed Yamaha tourer, complete but in need of some tlc didn't fetch $500.