When you buy a house at Auction.com it's because it couldn't sell through a realtor at any price, so that should tell you the house has serious issues and might need complete new drywall, roof, foundation repairs, plumbing etc... (and even worse - title or lien issue)
The house I bought required 75K in repairs, but it was really really cheap, so is that a scam or a good way to get your foot in the door and earn some sweat equity. People need to decide for themselves how much stress you want in a purchase of this magnitude. But please don't expect a Ferrari for the price of a pinto. (and it better be cheap or you're a fool for bidding because these homes have issues and those pretty pictures are usually old and don't show all the damage from being vacant)
(and if it's nice and not a junker, then you'll pay a normal price for it. The only good deals you might get if you're lucky are for totally trashed homes that have major defects. The kind of homes the realtor wish you wouldn't be able to inspect and that's why it's a perfect match - these homes don't allow an inspection)