REDC is a scam... they make you think it will get approved but 50% of the time it doesn't. These are the same guys who used to do those 'vacation lots' contract for deed in the early 2000s - they care about one thing, getting your money.
It is commonly known in the real estate industry that auction.com bids on its own properties to drive the bid up. The practice is illegal in most states and must be fully disclosed in states where its not legal. I wish the authorities would investigate them.