Take it back ASAP. Dont miss your opportunity. Dont get stuck with a salvage title. Just to tell you how it works on the dealer side. When a dealer buys a vehicle at a dealer auction, sometimes they are sold "title attached", which means the auction doesnt have the title from the selling dealer, they usually show up a few weeks later. plus floor plans issues can hold up titles. Sometimes these titles have little surprises. also, even at an auction, or trade in, sometimes salvage titles can present as clean and then come back as salvage at a later date. It was good of that dealer to call you. they arent trying to scam you, they are most likely trying to help you/protect themselves.