[Cadillac Tony]

I don't know about IL, but here in Florida a seller is required by law to disclose when a car was a factory buyback, plus it's printed on the title. In Florida that would mean a lower trade-in down the road, but if the deal is great up front that may not matter.

At that price, I'd be more worried about accident/flood damage than a lemon buyback. I've had the chance to buy cars at the auction at prices "too good to be true", and there's always a reason.